Ok well I'm still having issues, I tried it with the new q4000 and I get a solid blue light with diagnostic lights 1234 lit up, I take out the gpu and it still works fine
Do you mean same diagnostic light 234 when new gpu is in? This 234 code is supposed to suggest possible usb failure, but that does not help. Since the old card used to work but now both new/old card stop working w 790, logical suspicion is somehow bios cannot pass firmware test/POST when this card is in, but is okay to POST when this card is out. Have you already replaced cmos battery and cleared cmos settings by jumper reset?
thank Brad for already helping you on how to clear cmos. just to illustrate on the 790 MT motherboard the cmos and password jumper pins are shown in red circle (there may be a silkscreen of RTCRST next to cmos pins). default blue jumper is on password pins. after ground your fingers on chassis, you move blue jumper to cmos pins for 5-10 sec then move back to password pins.
Something that might help going forward, could you please upload a clear photo of the power label on your 500w PSU? Reason being is some PSU's may brag about more power, but may skimp on certain rails as compared to Dell OEM PSU, like the 3.3v/5v rail for one.
redxps630
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January 2nd, 2022 16:00
if I understand you correctly, pc is able to POST and boot without quadro 4000.
with quadro 4000 in pc, you see solid amber light, no display signal.
brad is correct to suggest replace cmos battery w a brand new CR2032.
also try clear cmos settings by reset RTCRST jumper on motherboard.
bradthetechnut
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January 2nd, 2022 14:00
Try it without the Quadro 4000. What do you get?
You said you "think" you got diagnostic code 2,3,4. Is this consistent when you try turning it on?
If the size 2032 CMOS battery is 5+ years old, it's time for replacement. Sometimes a bad battery will also throw a bad error code.
Centrix8
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January 2nd, 2022 15:00
my bad i forgot to say i did that and pc works fine, i only got error before i removed it
bradthetechnut
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January 2nd, 2022 16:00
Might be time for a different GPU card if you can try one. They do go bad on occasion.
Centrix8
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January 2nd, 2022 16:00
no my pc is working fine on integrated gpu
Centrix8
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January 2nd, 2022 16:00
yea i ordered another q4000, ill follow up if its still not working
Centrix8
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January 8th, 2022 07:00
Ok well I'm still having issues, I tried it with the new q4000 and I get a solid blue light with diagnostic lights 1234 lit up, I take out the gpu and it still works fine
Centrix8
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January 8th, 2022 09:00
How do you clear jumper? I haven't put new battery in and I'm getting blue light with 1234 and nothing on display
redxps630
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January 8th, 2022 09:00
Do you mean same diagnostic light 234 when new gpu is in? This 234 code is supposed to suggest possible usb failure, but that does not help. Since the old card used to work but now both new/old card stop working w 790, logical suspicion is somehow bios cannot pass firmware test/POST when this card is in, but is okay to POST when this card is out. Have you already replaced cmos battery and cleared cmos settings by jumper reset?
redxps630
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15.4K Posts
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January 8th, 2022 11:00
thank Brad for already helping you on how to clear cmos. just to illustrate on the 790 MT motherboard the cmos and password jumper pins are shown in red circle (there may be a silkscreen of RTCRST next to cmos pins). default blue jumper is on password pins. after ground your fingers on chassis, you move blue jumper to cmos pins for 5-10 sec then move back to password pins.
bradthetechnut
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January 8th, 2022 11:00
https://www.dell.com/support/kbdoc/en-us/000124377/how-to-perform-a-bios-or-cmos-reset-and-clear-the-nvram-on-dell-systems
Any particular reason why size 2032 CMOS battery isn't replaced? This also resets CMOS/BIOS.
I'm going to suggest to try a PSU Tester. Your current PSU may not be supplying enough power on all of the rails.
A good PSU to try: EVGA BR 700w PSU
Something that might help going forward, could you please upload a clear photo of the power label on your 500w PSU? Reason being is some PSU's may brag about more power, but may skimp on certain rails as compared to Dell OEM PSU, like the 3.3v/5v rail for one.