Top 10 Dell OptiPlex GX620 PC Desktop Questions & Answers

If the main power button LED is flashing or solid yellow, this could indicate a hardware problem.

 

Was it running good before?

 

Are the diagnostic LED lights all green?

 

Here is what dell says:

 

If the power light is blinking amber  —

 The computer is receiving electrical power, but an internal power problem might exist.

• Ensure that the voltage selection switch is set to match the AC power at your location (if applicable).
• Ensure that the processor power cable is securely connected to the system board.

Do you remember what the BSOD said?

Dell Optiplex GX620 has a failure power supply. A some of the capacitors inside it are poor quality :( .In this case is an emergency procedure to start power supply (ie. for backup) : make a temporary shortcut between green and black wire in main mo-bo connector (24 wires) , and use normal Power On button. When main fan starts remove temporary shortcut.

There is a Jumper on the motherboard to reset the system Password.

http://support.dell.com/support/edocs/systems/opgx620/en/ug/A02/advfeat0.htm#wp1117484

http://support.dell.com/support/edocs/systems/opgx620/en/ug/A02/mtcvrop0.htm#wp1051283

a clean installation

it is recommended to this service at least
once every 8 months, it wipes all your hard
drive from data, programs, bugs, errors and viruses
this will 100% solve your problem guaranteed.

for xp or vista, insert the installation disk
to be cleared you don’t need a specific disk made to your computer
if your coa says “Microsoft xp home or pro” then any windows home or pro
cd will do this the same apply to vista. So buy, borrow or download any OEM
not pirate version of the original operating system that is specified in your
Windows sticker. The oem cds can be found on ebay they should cost less
Than $10 or £10 do not buy the license version because your already have
The license underneath the laptop. “coa” is the sticker with the serial number
Which will be asked for in the middle of the installation.

restart the computer and a message will
come up asking to press any key to boot
from cd. once you do that "i mean you press a key"
then a blue screen will load then asks you
to press Enter to install xp.

1. press enter
2. select the partion and press enter
3. select continue "it warns you to delete files"
4. select format "quick"
5. now let it do the rest and follow instructions
6. when the installation is finished you'll notice
its like new again, some computers will need
drivers which you can get from manufacturer
website. download and install them.

that's it but for a detailed information click here

Try this: remove the DMOS battery and unplug the on/off switch plug. It's the one in the corner near the power supply. To be sure follow the cable from the front on/off switch board on back to this plug. Then plug the A/C cord in, if the system boots up fine, then replace the front panel power on/off swith board. Naturally you will not be able to power off the computer using the power switch (since we unplugged it), so you will have to just pull the plug. Hope this helps. Joe

You may have to boot into safe mode and reset the video settings to a safe setting like 1024x768.

1. To get into safe mode, continuously press F8 while the computer is booting up.
2. Eventually you will get a Windows XP Boot Menu.
3. Choose the option for Safe Mode.
4. Go to Start, Control Panel and double-click Display.
5. On the Settings tab, drag the slider bar to 1024x768.
6. Click OK
7. Shut down and reboot.

If the problem goes away, then you are good. Otherwise, you'll have to boot menu again (F8) and choose Enable VGA Mode.

Could be a bad power supply, bad motherboard, bed device such as a disk drive dragging your system down, or a bad card plugged into the motherboard. Easiest thing is to remove devices such as PCI cards and hard drives one at a time to see if the problem clears. If it doesn't, continue on at your own risk.

If your handy with a multimeter, you can make some checks to see if your power supply is good. Read below:

You have to determine if the power supply is good or the motherboard or some other device is bad.

You will need a voltmeter/multimeter and some experience in reading voltages. If you are unsure, quit now and take it to a professional so you don't shock yourself. Continue on at your own risk.

Using your meter set to DC, and computer on and opened, find your molex connector for any drive bay. Google Molex if your unsure what they look like.Then read Yellow to Ground -should be +12VDC. Read Red to Ground -should be +5VDC. If your not sure what ground is, you should NOT be doing this. Continue on at your own risk!

If these voltages are good, your PS is PROBABLYgood, and you can hook up the motherboard and hard drive. If your unit powers up fine reconnect every remaining device until the bad device is inserted and the problem returns. If your power supply did not read good then read below:

Your power switch on the front of the machine gets connected to the power supply via motherboard. The main power connector at the motherboard passes a momentary "short" signal to the power supply to turn it on. You need to recreate this event with a paperclip.

Another way to isolate whether your power supply is bad, you must disconnect the power supply from ALL other devices.

Then disconnect the AC input power from the back of the power supply.

Then you can use a paperclip to jumper ANY green wire to black wire on the largest plastic connector that you disconnected from the motherboard. Insert the paperclip with everything unplugged and stand back.

Once you are clear from the unit. Plug in AC power from wall to back of power supply and see if the fans start up on the power supply. If they start then half of your supply should be good. Re-read your DC voltages at molex to verify other half.

Hook up devices one at a time to see if they do their power up routine with motherboard UNHOOKED. You should hear drives spinning and see lights flashing. You do not need to whole computer reassembled for this part to work. If all devices are hooked up and seem ok, then your motherboard is bad.

I don't think you can install 8gb of ram into that desktop. If the processor fan is too loud check it for dust or any other obstructions. If there aren't any try replacing the fan - it could be a bearing in the fan.

One of your memory chips is bad.

Maybe your memory is bad or the memory slot is bad.

Remove the Power Cord, Open the Case and remove one of the memory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x on it with an ink pen. If it fails to boot then move the chip to the next memory slot and try rebooting. If it fails take the chip out and set it aside, then put the other chip in and try booting it in both slots. If it boots, just to verify that the chip set aside is bad, mark an x on it and put it into the open memory chip slot and try booting.

Diagnostic Lights CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide. To help you troubleshoot a problem, your computer has four lights labeled "1," "2," "3," and "4"on the front or back panel. The lights can be off or green. When the computer starts normally, the patterns or codes on the lights change as the boot process completes. When the computer starts normally, the patterns or codes on the lights change as the boot process completes. If the POST portion of system boot completes successfully, all four lights display solid green. If the computer malfunctions during the POST process, the pattern displayed on the LEDs may help identify where in the process the computer halted.
NOTE: The orientation of the diagnostic lights may vary depending on the system type. The diagnostic lights can appear either vertical or horizontal.

Light Pattern

Problem Description

Suggested Resolution


The computer is in a normal "off" condition, or a possible pre-BIOS failure has occurred.
The diagnostic lights are not lit after the computer successfully boots to the operating system.
Plug the computer into a working electrical outlet and press the power button.


A possible BIOS failure has occurred; the computer is in the recovery mode.
Run the BIOS Recovery utility, wait for recovery completion, and then restart the computer.


A possible processor failure has occurred.
Reinstall the processor and restart the computer.


Memory modules are detected, but a memory failure has occurred.

• If you have one memory module installed, reinstall it and restart the computer. (see "Memory" for instructions on how to remove and install memory modules.)
• If you have two or more memory modules installed, remove the modules, reinstall one module, and then restart the computer. If the computer starts normally, reinstall an additional module. Continue until you have identified a faulty module or reinstalled all modules without error.
• If available, install properly working memory of the same type into your computer.
• If the problem persists, contact Dell.

A possible graphics card failure has occurred.

• If the computer has a graphics card, remove the card, reinstall it, and then restart the computer.
• If the problem still exists, install a graphics card that you know works and restart the computer.
• If the problem persists or the computer has integrated graphics, contact Dell.

A possible floppy or hard drive failure has occurred.
Reseat all power and data cables and restart the computer.


A possible USB failure has occurred.
Reinstall all USB devices, check cable connections, and then restart the computer.


No memory modules are detected.

• If you have one memory module installed, reinstall it and restart the computer. (see "Memory" for instructions on how to remove and install memory modules.)
• If you have two or more memory modules installed, remove the modules, reinstall one module, and then restart the computer. If the computer starts normally, reinstall an additional module. Continue until you have identified a faulty module or reinstalled all modules without error.
• If available, install properly working memory of the same type into your computer.
• If the problem persists, contact Dell.

Memory modules are detected, but a memory configuration or compatibility error exists.

• Ensure that no special memory module/memory connector placement requirements exist.
• Verify that the memory modules that you are installing are compatible with your computer.
• If the problem persists, contact Dell.

An other failure has occurred.
This pattern also displays during System Setup and may not indicate a problem.

• Ensure that the cables are properly connected to the system board from the hard drive, CD drive, and DVD drive.
• Check the computer message that appears on your monitor screen.
• If the problem persists, contact Dell.

After POST is complete, all four diagnostic lights turn green briefly before turning off to indicate normal operating condition.
None.