G85 Won't Power up

	G85 Won't Power up by jaybmc (7/30/04 4:36 PM) reply	+ / -
I have a 2 year old HP Officejet G85 All in one, which will not power up. The powersupply seems to work, any ideas. Are there any internal fuses, is the on/off button know to be bad???..... Thanks in advance, Jay B.

	Re: G85 Won't Power up by Anonymous (7/30/04 5:32 PM) reply	+ / -
Sanity Check The green light on the power plug is on and not flashing? The power supply outputs 18 VDC? The control panel display says self test when the power is plugged in? If it does not, that opens the possibility of a blown fuse, a defective main board or control panel board. If it does the power on button may not be working. Heading for the barn, post what you find.

	Re: G85 Won't Power up by jaybmc (7/31/04 7:53 AM) reply	+ / -
The Green light is on, not flashing. Is there an internal fuse? The control panel is blank, dead. Thanks for the help, and ideas. Where is an internal fuse? Jay B.

	Re: G85 Won't Power up by Bert (7/31/04 10:02 AM) reply	+ / -
If there are any fuses they will be on the main electroics board and marked with an F prefix. Their shape is uncertain since HP uses several styles. You will have to remove the case to get at it. Officejet G85 Removing the Case Removing the rear cover. Looking from the rear, remove the T20 Torx screw on the left. This will allow you to remove the LIU (Line Interface Unit) cover and unplug the LIU. There are two push latches underneath that release the rear panel. It will hinge upward. Cables Removing the rear panel will reveal some cables connected to the scanner. Disconnect them. Removing the Scanner Tilt the scanner upward as if you are going to access the cartridges. You will see two large springs. Remove them. The front of the scanner pivots on two large hinges. Pry them apart with a slot style screwdriver. They will resist but will release and allow the scanner to rotate upwards. Rotate the scanner approximately 90 degrees and it will lift off of it's rear hinges. Use caution as you remove it in case you do not have all of the cables previously mentioned disconnected. Removing the rest of the case There is a flat piece held on by four T10 Torx screws and two side covers that will hinge outward when two T10 Torx screws on each one are removed. When the side covers hinge outward they can be removed.

	Re: G85 Won't Power up by jaybmc (8/7/04 9:59 AM) reply	+ / -
I bought a used G85 on Ebay. It works. Using it as a base to test parts, the problem lies in the main internal base of the printer. The ADF and scanner work fine. I think the motherboard got fried. Any ideas on how to get a used working motherboard, or just keep the old one for parts???

	Re: G85 Won't Power up by Bert (8/8/04 1:20 AM) reply	+ / -
I don't have any sources for the board other than searching for a parts machine.

	Re: G85 Won't Power up by fxgreek (4/27/06 7:07 AM) reply	+ / -
G85 Will not power up. Display is Blank and no sounds of any kind. Opening the front as to replace the Ink Catridges, NOTHING happens Cartriges DO NOT RETRACT to the middle of printer for replacement. This happened suddenly while it was working fine. Led is Green on the external power supply and voltage measures 20VDC when measured directly (NO LOAD) Are there any fuses inside the G85 does anybody know?? Are there any suggestions to help trouble shoot?? Are there any posts or links I should look up? Thanks George

	Re: Re: G85 Won't Power up by fxgreek (4/27/06 7:11 AM) reply	+ / -
Bert before I go through the trouble opening the G85 UP do you have any more information on the G85 NO Power UP problem? External power module has GREEN LED SOLID and measures 20VDC with no LOAD. Thanks George

	Re: G85 Won't Power up by Stephen (4/27/06 11:14 AM) reply	+ / -
Then you probably need to replace the main board, and HP doesn't sell them. If you are really lucky it might be bad solder joints at the power connector on the board.

	Re: G85 Won't Power up by ctommyw (8/5/06 1:10 PM) reply	+ / -
My G85 "flicker" instead of being Solid on the power cord... Does that mean I need to replace the power supply? Should it be solidly Green? Please Help...

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