x (Duplex+network+factory 3rd paper tray, essentially the same as the dtn, only found in large offices).dtn (Duplex, Tray, Network, 2nd tray, uncommon).dn (Duplex+network, very common as well).Base (USB only, no other ports, no auto duplex).Each printer is identical to open up, but with different connections: Being a RoHS board helps, but PCB chemicals aren’t something you want to eat. Please use a oven that will never see food again. Reflowing the formatter board does salvage the printer so I will mention it, but this is as far as I'd go if I was going to try to repair one of these and I had a lot of leftover toner in a open cartridge when it died. Don’t waste money on a repaired formatter board - they die the same way and some data will be lost forever like the page count, formatter number and serial number UNLESS you can somehow procure the LJ service tools HP uses or use PJL if it's an option. However, it may be enough you will be happy with the increase. While the heatsink patch may help working units which have no early signs of trouble, it doesn’t do a whole lot of good on a failed one as the damage is done. If you aren't down with recycling, give it away to someone who will use cheap aftermarket toner in it until it fully fails as a nice throwaway printer. Replace it once you’ve run out of consumables. The defect is repairable, but ANY attempts WILL BE TEMPORARY and it WILL KEEP FAILING! Sell off any spare unopened toner stock and empty anything you have opened while it runs, even if it means printing for friends as a favor with a heads up you're finishing off consumables on a failing printer and it won't last forever. If it still has issues, don’t waste any more time on it - it's dead. The USB cable fix is worth a shot at this point since the cables are cheap, but just keep in mind it’s likely a bad formatter board and it may not help. I'd say buy knockoff toner as needed if yours still works. Buy a new printer and run both until it fails. The problem was common on them when they weren't older, but as they age the risk grows to a point they're not worth buying and if you own one, plan for failure. In most cases where the printer does not respond, it's often formatter related on this series. The P2015 series is known to have widespread formatter board issues.
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