Just looking for the motherboard manual and cd for a dell optiplex gx620. I'm learning about my computer.

http://www.dell.com/support/drivers/us/en/19/Product/optiplex-gx620

http://www.dell.com/support/Manuals/us/en/19/Product/optiplex-gx620


BEST I FIND.

Open the box (unplugged) and take the memory out. Plug it back it, if you turn it on and there are no beeps, the motherboard has gone bad. Only fix is to replace the motherboard, or replace the whole computer. If it does beep, the memory is bad; replace the RAM (memory) While you have the computer open look at the little can like objects close to the back opening of the computer. If they have brown goo on top of them, or around them, or if the tops of some of them are dome shape, the motherboard is shot. This was a common problem with some of the OptiPlex units.

Rajesh,
You can click the link below to download the online user manual. There is a section within the manual titled clearing forgotten passwords by using the jumpers on the motherboard.

Dell Optiplex GX620 Online Users Manual
http://dell.to/1dPbux6

Thank You,
Dell-Jesse L
Dell Social Media and Communities

1) Does it have a separate Ethernet Card, or is it integrated?
(Part of the motherboard)

Reasoning?

The Dell Optiplex GX620 comes with Integrated networking.
The chipset is a Broadcom 572.
It's part of the motherboard, and you plug the Ethernet Cable into the back of the computer.

However, you could have a separate Ethernet Card, plugged into the white PCI expansion slot on the motherboard.

http://www.ebay.com/itm/Dell-Optiplex-GX620-SFF-Motherboard-F8101-KH290-PY423-20-Available-/370743464509?pt=Motherboards&hash=item565208523d

A) If you are using a separate Ethernet Card, replace it.

B) If you are using the Intergrated networking of the motherboard, (Plug Ethernet cable into back of computer), use an Ethernet Card instead.

White PCI slot.

You have a short circuit when you plug the Ethernet Cable into the motherboard. Don't use the motherboard networking, use an Ethernet Card.

2) Plugging an Ethernet Cable into a computer that is on, = No.
It is not a Plug N' Play item.

(Not stating this is what you are doing.
Just posting in case you are. Burns out the Ethernet chipset on the motherboard)

For additional questions please post in a Comment.

Regards,
joecoolvette

well its seems to be win the lottery,or hammer,or change the CPU

These issues are usually caused by the bad capacitors on the motherboard as Computerscot stated. Here is a repair guide that shows how to check your board for the bad capacitors and what to do if you find them.

http://www.ccl-la.com/blog/index.php/dell-optiplex-gx620-motherboard-repair/

I hope this helps, if so please rate my solution.

BuddyMc

may be your computer have no proper sound drive so u must install your sound driver first after we can check the hardware error of your motherboard.. you can download driver from here http://www.getpcmemory.com/drivers/download-dell-optiplex-gx620-desktop-pc-windows-xp-vista-drivers/

Check the capacitors on the motherboard, Dell had a BIG problem with faulty capacitors on the GX270, GX520, GX620, GX745 and GX755 units. The parts would cause the unit to either not boot at all or lockup booting or running programs. I would bet you have some that are just beginning to fail and the motherboard power is not stable which would mean the chips are not getting enough power. Here is a link to an article about the issue and what to look for on your board.

http://www.ccl-la.com/blog/index.php/dell-optiplex-gx620-motherboard-repair/

I hope this helps you out, if so please rate my solution.

BuddyMc

Replace you video adapter

Here is a link to a manual for this computer.
http://support.dell.com/support/edocs/systems/opgx260/en/ug/solvprob.htm#1166448
Look where it states Diagnostics lights and see if the light patterns in the back panel lights match any on the list. It might help you on pin pointing your issue. If it is a memory issue and you have already replaced it then it is the motherboard.
found this link on ebay.com
http://shop.ebay.com/?_nkw=Dell+Optiplex+Gx260+motherboard&_sacat=See-All-Categories&_fromfsb=&_trksid=m270.l1313&_odkw=Dell+Optiplex+Gx260&_osacat=92924