asked Jun 22, 2013 at 9:39am
Hp HP DeskJet Plus


Hi. My printer would power up normally but after a while it just stopped altogether - no display, no power. The "on" time got shorter & shorter & now it won't power up at all. Fortunately, I have another 2P plus that I'm using for parts. I swapped out the main power supply (not high voltage supply) - no help. I ohmed out the on/off switch & it's okay. Anybody have any ideas? Thanks in advance for help - I know it takes precious time to respond.
Every one I've ever seen do that was because of the power supply. That's the one the AC plugs into. Could be the DC controller as that supplies all the DC voltage needed to run everything. Are you sure the power supply from your parts printer works?
by moe on Jun 22, 2013 at 12:12pm Add comment
Yes, I'm sure it's a good power supply. Is the DC controller the PC board that lays flat? The one that is revealed after removing the plastic case & the first "layer" off the top of the unit during disassembly? Thanks.
by bsiprelle on Jun 22, 2013 at 3:39pm Add comment
Yes, the small board with all the connectors going to it. Be careful when pulling out the fiber optic to the laser. You can pull the end off.
by moe on Jun 22, 2013 at 5:30pm Add comment
Thanks. I'll try that , hopefully tomorrow. Do you know of a good web site that has good diagrams, exploded views, part #'s ? - bsiprelle
Moe, I swapped out the DC controller PC board, no help. I also swapped out the on/off switch, no help. Then, one at a time, I disconnected all the outputs of the DC controller & tried to power up, no help. Just to double check all I had done, I installed all the "suspect" parts into the donor printer & it powers on just fine. I also monkeyed with the interlock plunger that goes from the toner cartridge door to the main pwr supply, that looks okay too. The cord is good too. This is making me crazy. I hate to give up on it...seems like its probably something simple I'm missing. Any ideas are welcome. Bill
by bsiprelle on Jun 23, 2013 at 5:56pm Add comment
You've done pretty much everything. Reading what you've tried, I can't suggest anything else other than changing the printer you are trying to resurrect to the other one as it seems more cooperative. Not knowing why you're not trying to fix the other one, I can't offer any more advice.
by moe on Jun 24, 2013 at 10:18am Add comment
moe, thanks for all your help. I guess it is time to re-evaluate the "donor" printer.
by bsiprelle on Jun 25, 2013 at 7:16am Add comment
I would swap the fuser since if bad it could cause the printer not to power on at all.
by dmzcompute on Jun 26, 2013 at 5:14am Add comment
Thanks for the tip - I'm going to try that today. I'll let you know. - bsiprelle
I swapped the fuser, no help. Thanks for all the help & ideas. I appreciate the time folks take to help others.
by bsiprelle on Jun 27, 2013 at 3:38pm Add comment