Service History — Irvine, CA

Problem: HP Color LaserJet Pro MFP M476dn producing lines across copies.

Solution: Performed major internal cleaning. Found Yellow, Cyan, and Magenta toner cartridges fully depleted; replaced all three and tested output. Lines resolved, unit returned to normal operation.

Problem: HP LaserJet M609dn reported repeated paper jams originating from Tray 2 and Tray 3.

Solution: Diagnosed jams to a seized Tray 2 separation roller. Freed and serviced the locked roller, cleaned the paper path, and tested feeding from both trays to confirm reliable operation.

Problem: HP LaserJet M404 reported a recurring error condition, with the customer also requesting a factory reset evaluation.

Solution: Replaced the Tray 2 pickup roller assembly and Tray 2 separation roller assembly. Cleaned internal paper path components and tested printer to verify normal operation.

Problem: HP DesignJet T2300 wide-format plotter in Aliso Viejo displaying a persistent 'Please Restart' error, preventing normal operation.

Solution: Technician rebooted the T2300, reloaded media following the on-screen prompts precisely, ran internal test prints, and cleaned the unit. All prints passed verification.

Problem: HP LaserJet M632h MFP displayed a 49.38.OC error after producing unusual faxing-type noises followed by banging sounds, causing the touchscreen to go gray and rendering the device unresponsive to remote IT access.

Solution: Technician accessed the pre-boot menu to perform a partial hard drive clean and re-establish firmware. Scan-to-email functionality was reconfigured on-site. Printer was cleaned and tested to confirm normal operation.

Problem: HP DesignJet Z5600 44" reported horizontal voids spanning all color channels through printed images, and Excel/PDF jobs holding with an 'On Hold For Paper' prompt requiring manual resume at the control panel.

Solution: Performed a Paper Advance Calibration to eliminate horizontal voids across the print path. Resolved the 'On Hold For Paper' condition by toggling the 'Show Print Preview' setting off within the printer driver. Cleaned and tested the plotter; subsequent full-color output printed without voids or hold

Problem: HP LaserJet MFP M630 reported repeated document feeder jams accompanied by a grinding noise during pickup.

Solution: Diagnosed ADF error code 31.13.13 with jams occurring at the pickup stage. Replaced the ADF assembly (B3G86-67901), reset counters, calibrated the unit, and cleaned the machine. Tested and confirmed normal operation.

Problem: Lexmark XM1145 in Torrance reported as needing scan-to-email configuration. A depleted toner cartridge prevented network visibility and printing of configuration pages during initial diagnosis.

Solution: Confirmed the Lexmark XM1145 was already configured for scan-to-email via a PowerFlow application server. Once a replacement toner cartridge was installed, the printer became visible on the network again. Scan-to-email workflow tested and verified functional.

Problem: HP DesignJet Z5600ps wide-format plotter in Buena Park experiencing recurring cyan ink fading — output would appear correct for a few prints, then cyan would drop out repeatedly.

Solution: Technician traced the fault to an air bubble lodged in the cyan ink port inside the carriage assembly. Replaced the ink tube assembly (T0B51-67017) with trailing cable and purged ink lines. Post-install initialization revealed all three printheads were near end-of-life — confirmed when the plotter f

Problem: HP DesignJet T920 plotter repeatedly displayed error code 21:13, halting at 100% of the PrePrinting System Mode initialization sequence.

Solution: Technician cleaned and oiled the carriage rail, reseated the print head assembly, and inspected for debris around the service station. With the fault persisting through full FSCK and initialization cycles, the service station (part #CR357-67025) was replaced. Printer cleaned and tested confirmed nor

Problem: Customer's HP LaserJet M404dn was printing too light and could not keep up with daily print volume, prompting an upgrade to a higher-capacity model.

Solution: Delivered and installed an HP LaserJet M507dn with an optional Tray 3 unit. Toner density was found set to 50% and corrected to 100%. M404dn was returned for evaluation.

Problem: HP LaserJet M630 presented with paper lifting failures across multiple trays. One tray was physically destroyed; a second was severely damaged. The Tray 3 pickup assembly was non-functional and the feed roller assembly had shifted on its rod.

Solution: Replaced Cassette Tray 2 (RM2-5094-000CN), Cassette Tray 3 (RM2-5094-000CN), Tray 3 paper pickup assembly (RM2-0341-000CN), and paper feed roller assembly (RM1-8411-010CN). A fifth damaged component was reassembled from salvageable parts. All tray and feed functions verified operational post-repair.

Problem: Lexmark MS621dn laser printer in Tustin was due for scheduled maintenance kit installation.

Solution: Technician installed the customer-supplied maintenance kit, performed a full interior cleaning and vacuuming, and tested the printer to confirm proper operation.

Problem: HP Color LaserJet MFP M477fdw producing blank pages with black drag marks; toner not laying image on most prints, intermittently printing one page before failing again.

Solution: Diagnosed ongoing blank-page and black drag-mark issue traced to suspected low-quality remanufactured black toner cartridges, compounded by a prior toner leak. Tested multiple black cartridges with inconsistent results. Advised customer that OEM HP black toner is required to determine whether the pr

Problem: HP LaserJet M402dw brought in for an insurance repair assessment following a roof leak in the customer's warehouse. Both spare printers had been exposed to mold and mildew.

Solution: Technician disassembled, inspected, cleaned, and tested the unit. No moisture, mold, or mildew was found on this printer — it had accumulated dust from storage. Unit tested normally. A repair assessment was documented for insurance purposes.

Problem: HP DesignJet T1100 24" (Q6684A/Q6683A) displayed persistent error 02.1:10 that could not be cleared through power cycling or supply removal.

Solution: Reseated trailing cables and formatter; tested alternate power outlet — error persisted at 100% power-cycle completion. Three suspect components identified (carriage assembly Q6683-60199, main PCA/power supply Q6683-60192, 24" trailing cable Q6683-60229, and belt Q5669-60673), but parts confirmed di

Problem: HP Color LaserJet M570 MFP presented with a 57.00.F / 59.00.F error code and an unresponsive control panel.

Solution: Performed factory reset to restore control panel responsiveness. Diagnosed intermittent 59.00.F fuser-drive errors, ITB streaking, a near-full waste toner container, worn ADF kit, and worn Tray 2 feed and separation rollers. Quoted replacement of fuser drive assembly (RM1-8134), ITB (CD644-67908), w

Problem: Lexmark XM5365 MFP required delivery and installation at a Lake Forest, CA location as part of a multi-site deployment.

Solution: Delivered and installed Lexmark XM5365 MFP with LX50-18 cabinet, 550-sheet tray, and surge protector. Configured the unit and provided network information to the customer. PC-side setup such as scan-to-email was noted as outside scope, deferred to the customer's IT department.

Problem: HP LaserJet 4240 reporting persistent paper jams, with paper skewing and multiple sheets feeding simultaneously from Tray 2.

Solution: Leveled paper stack below the tray lip to address initial overfill. Replaced two worn RM2-5642 rollers and one RM2-6046 roller. A follow-up visit revealed continued jamming; fuser was tested and ruled out. Root cause identified as failed feed components — replaced the feed roller assembly (RM1-0012-

Problem: Lexmark T654 laser printer in Garden Grove experiencing persistent paper jams and print jobs displaying 'Printing' status without output, requiring a power cycle to recover.

Solution: Inspection revealed a heavily worn, deteriorating fuser assembly (40X4418), a slick transfer roller (40X1886) requiring replacement, and a faulty formatter/System Card Assembly causing the print-spooling fault. A repair quote for all three OEM components was prepared; the customer elected to replace

Problem: HP Color LaserJet MFP M680F reporting persistent paper jam errors 31.13.02 and 48.05.03.

Solution: Disassembled the ADF unit; found no physical obstructions. Diagnosed an ADF sensor failure. Replaced the ADF assembly (CZ248-67916) and tested the unit. Scanner control board was evaluated but ruled out based on technical documentation.

Problem: Customer required a replacement HP LaserJet M604n laser printer for their Newport Beach office.

Solution: A refurbished HP LaserJet M604n unit was sourced and delivered to the customer's location as a replacement device.

Problem: HP LaserJet M605 displaying fuser maintenance message; machine due for scheduled maintenance.

Solution: Cleaned the printer, ordered and installed an F2G76A fuser maintenance kit. Initial fuser unit arrived damaged and was returned; replacement unit received and installed, counter reset, and unit tested.

Problem: HP LaserJet P4015 reported multiple issues including paper jams and degraded print quality.

Solution: Installed HP CB388A maintenance kit (fuser kit, 110/120V) on the HP LaserJet P4015 (page count: 34,212). Verified jam-free operation and confirmed restored print quality post-installation.

Problem: HP DesignJet Z6100 42" reporting paper jam error 86:01.

Solution: Removed right side cover; found drive belt torn and tensioner warped. Installed CQ109-67004 42" belt and tensioner kit, oiled the carriage rod, and replaced all eight printheads from customer-supplied stock to correct severe color print-quality degradation across all channels. Output tested and conf

Problem: Lexmark MX710de producing a persistent line on scanned pages when scanning to email.

Solution: Cleaned the ADF, flatbed glass, and full machine interior. Removed residual factory packing tape and ADF cushion left from original installation. Explained difference between ADF and flatbed glass scan paths to the customer. Tested scanning; issue resolved.

Problem: HP LaserJet M630 MFP producing lines in ADF scans; customer reported issue did not appear in copies, though lines suggested a hardware-side origin.

Solution: Diagnosed intermittent ADF scan lines to a contaminated ADF glass strip, compounded by repeated cleaning with Lysol wipes. Cleaned glass with window cleaner and microfiber cloth; issue reproduced and confirmed resolved on follow-up visit.

Problem: Lexmark MS810 laser printer in Buena Park required a maintenance kit replacement due to accumulated wear on internal feed and fuser components.

Solution: Installed a complete maintenance kit on the Lexmark MS810, cleaned internal components, and tested the printer to confirm proper operation and print quality.

Problem: HP Color LaserJet M551 presented multiple issues during a scheduled preventive maintenance visit, requiring transfer kit replacement, tray 2 roller service, a firmware update, and an NVRAM reset.

Solution: Replaced the transfer kit (CF081-67904), tray 2 feed roller (RM1-8131-000), and tray 2 separation roller (RM1-8129-000). Performed a firmware update and NVRAM reset. Installed customer-supplied toner cartridges and tested the unit to confirm full functionality.

Problem: HP LaserJet 4250tn in Newport Beach reported a popping sound originating from Tray 2, accompanied by false jam errors with no visible paper jam present.

Solution: Technician re-seated all Tray 2 components, cleaned the tray and paper path, and identified slight binding in the tray causing the lifter motor to pop when raising paper to the pickup rollers. All components tested correctly after service.

Problem: HP LaserJet MFP M426dw in Santa Ana produced horizontal lines on all copies and scans originating from the ADF.

Solution: Technician cleaned the ADF scanner glass, eliminating the line artifacts. Remaining scanner lens and printer internals were cleaned and the unit was tested to confirm clean output.

Problem: Lexmark MS810 laser printer produced a loud clicking noise during print cycles.

Solution: Inspection revealed the fuser heating element film was tearing. Replaced the maintenance kit and reset the fuser count. Cleaned the redrive rollers and tested the unit — noise resolved.

Problem: HP DesignJet Z2100 photo plotter arrived with a shredded carriage belt. Inspection revealed heavy ink contamination across the service station, fan blades, and fan housing, plus a worn cutter assembly. After those repairs, yellow output was completely absent.

Solution: Replaced carriage belt Q6659-60175, service station Q6718-67025, and cutter assembly Q5669-60713; cleaned all ink contamination. Diagnosed absent yellow output to the magenta/yellow combination printhead C9406A and replaced it. Unit printed correctly across all colors upon completion.

Problem: HP 9250c Digital Sender producing dirty scans with visible streaks across scanned output.

Solution: Replaced the scanner maintenance kit and cleaned the scanning assembly. Follow-up confirmation from the customer verified no streaks present and the unit returned to normal operation.

Problem: Customer in Corona, CA required a new Lexmark MS431dw laser printer.

Solution: A new Lexmark MS431dw was sourced and shipped directly to the customer via UPS.

Problem: HP LaserJet 4250 experiencing repeated paper jams at the rear door. Customer had replaced the toner cartridge, but jams continued after the swap.

Solution: Installed HP maintenance kit (RM1-1082), including fuser and rollers. Cleaned trays and covers, then reset the maintenance counter. Printer tested and confirmed jam-free after service.

Problem: OKI Microline 491 dot matrix printer in Garden Grove reported persistent alignment failures and loud noise following a prior gear replacement — a callback visit.

Solution: On-site inspection revealed the printer was operational but emitting a popping noise from the right side. The post for one of the recently installed gears was found cracked at its base where it meets the frame. The technician identified that the main chassis assembly (part #42115004) would need to b

Problem: HP LaserJet Pro M428fdw MFP reported long pauses during printing and incorrect scanner behavior. Flatbed scanning stopped approximately 3/4 across the scan bed, producing incomplete images with no data on the lower portion of the page.

Solution: Technician diagnosed the flatbed scanner assembly as the root cause; ADF scanning functioned normally. Tray 2 pickup roller (RM2-5452) and separation roller (RM2-5397) were also found worn. Customer declined repair and opted to replace the unit.

Problem: HP LaserJet 5200dtn reported a paper jam on every 11×17 page fed through the large-format tray.

Solution: Installed a full maintenance kit, replacing all applicable components. Cleaned the machine interior and exterior, then verified the repair by running 15 sheets through the letter tray and 10 sheets through the 11×17 tray without incident.

Problem: Brother MFC-9340CDW producing faded output across all color channels.

Solution: Drums tested at 75% remaining life and transfer belt at 90%; neither warranted replacement. Third-party toner cartridges were identified as the likely cause. Customer was advised to install genuine Brother toner cartridges as the first diagnostic step before evaluating further supply or component re

Problem: HP LaserJet M606 laser printer required a replacement fuser unit.

Solution: Technician delivered a new fuser unit to the customer site in Garden Grove and collected the spent fuser core for return.

Problem: HP Color LaserJet 700 MFP M775 reported print quality issues traced to a toner blockage in the auger area of the transfer belt assembly.

Solution: Technician removed the transfer belt, vacuumed out the toner blockage in the auger area, cleaned the affected components, and tested the unit to confirm restored print quality.

Problem: HP E52645 MFP producing lines on copies when scanning through the document feeder.

Solution: Technician cleaned the ADF glass on the HP E52645 MFP. Post-cleaning test confirmed the line artifacts were eliminated and image quality restored.

Problem: HP Color LaserJet 500 MFP M575 leaving a faint line on every printed page.

Solution: Inspection revealed a torn sheet of paper lodged in the transfer belt cleaner blade, which had damaged part of the cleaning foam wand. Technician disassembled the transfer belt assembly, extracted the torn paper and damaged foam wand, and purged accumulated toner from the unit to restore interim usa

Problem: Lexmark MS810 laser printer reported jamming at the Buena Park location, with a page count of 121,499.

Solution: Inspection revealed the upper re-drive assembly was broken — specifically, the spring responsible for holding the guide plate fingers open had failed. The unit was temporarily stabilized, and the upper re-drive assembly (P/N 40X7602) was subsequently replaced with a new unit, clearing the jam condit

Problem: HP LaserJet M607n presented with multiple missing and worn components: no toner cartridge, fuser, transfer roller assembly, transfer hinge cover, tray 2 separation roller assembly, and a worn tray 2 pickup roller assembly.

Solution: Technician assessed the unit and identified required parts — fuser RM2-1256, transfer assembly RM2-1248, transfer hinge cover RC4-8188, tray 2 pickup roller RM2-1275, and separation roller RM2-6772. The transfer roller assembly could not be sourced; the customer elected not to proceed with repair an

Problem: Lexmark MS610dn repeatedly jamming at the tray with error code 241.06. Pick tires were spinning on the paper lift, causing false jams.

Solution: Replaced pick tires (part #41X0958) with the updated Lexmark-specified style. Cleaned the printer, tested operation, and confirmed jam errors resolved.

Problem: HP LaserJet MFP M632c reported error 13.B9.D3 (jam in right door) with faded print on one side after supplies and fuser had been replaced.

Solution: Identified and reseated a dislodged transfer spring. Cleaned the machine and replaced roller kits in trays 2, 3, and 4 (part J8J70-67904). Verified error cleared and print quality restored.

Problem: Lexmark X746de reported making noise during operation and producing streaked output on black print.

Solution: Diagnosed a failing fuser (40X8110) as the primary cause of streaking and noise. Replaced the fuser assembly and pick rollers (40X5152). Black print quality restored; minor color variance on external-sourced images noted, likely transfer belt related.

Problem: HP LaserJet M610 required a firmware update; the IPDS software could not detect the IBM USB dongle needed for operation.

Solution: Technician cleaned the unit and loaded firmware version 4.12. Investigation revealed the dongle required a specific firmware version unavailable on HP's website. IT confirmed a replacement dongle would be sourced. Updated troubleshooting notes; call closed.