Dell Optiplex 9020 AIO - Powers up but Black display

[qwertyaas]

Powering on the Optiplex 9020 AIO, the display remains black. No splash screen, no BIOS, not even a screen flash

• Tested PSU and works
  
  
• Tested display with Dell built in test and display works and shows all colors
  
  
• Fans all spin up and remain spinning
  
  
• Power button remains solid white while turned on
  
  
• Removing Ram - system goes through the beep error codes
  
  
• Reseated Ram
  
  
• Tried external monitor and nothing
  
  
• Did a GPU reflow on the chip with a heat-gun but did not have an IR thermometer on me - went gradually to 210C and held that temp around 3-4Inch away for 20 seconds and then gradually back down

Took apart the AIO and checked all connections and all looks plugged in.

Any ideas?

 

[defaultluser]

Toss it in the trash bin and buy another like you're supposed to?

That's what thees things are built for. You've already done more troubleshooting than an over-the-phone tech would have done before giving up and sending you a refurb replacement.

 

[qwertyaas]

Toss it in the trash bin and buy another like you're supposed to?

That's what thees things are built for. You've already done more troubleshooting than an over-the-phone tech would have done before giving up and sending you a refurb replacement.

Where's the fun in that?

But at this point, guess it's time to salvage whatever is in there and toss the rest.

 

[GiGaBiTe]

Did a GPU reflow on the chip with a heat-gun but did not have an IR thermometer on me - went gradually to 210C and held that temp around 3-4Inch away for 20 seconds and then gradually back down
Any ideas?

+1 for defaultuser's suggestion of tossing it in the trash.

If it wasn't totally dead before you got the genius idea to fry the machine with a heat gun, it is now.

Heat gunning a board is not reflowing, especially if no flux is used.

 

[qwertyaas]

+1 for defaultuser's suggestion of tossing it in the trash.

If it wasn't totally dead before you got the genius idea to fry the machine with a heat gun, it is now.

Heat gunning a board is not reflowing, especially if no flux is used.

Heat gunning GPUs on a board worked in the past. I never used flux when doing that on a GPU either - it revived quite a few cards.

But anyway, tossing it. Nothing lost other than a some time.

 

[GiGaBiTe]

It doesn't work, it's just a temporary fix. The solder gets tacky enough to make a weak connection, but any tiny amount of thermal stress will cause it to fail again.

At best it lasts a year or two, a worst, a few weeks or months.

ROHS solder is junk.

 

[Gordo74]

Really dumb suggestion - Plug in a USB keyboard. My Optiplex 9010 exhibits the same behavior without one.

 

[qwertyaas]

Really dumb suggestion - Plug in a USB keyboard. My Optiplex 9010 exhibits the same behavior without one.

Yeah tried that first.

It doesn't work, it's just a temporary fix. The solder gets tacky enough to make a weak connection, but any tiny amount of thermal stress will cause it to fail again.

At best it lasts a year or two, a worst, a few weeks or months.

ROHS solder is junk.

It was just needed for temporary fix anyway. But it didn't work so in the trash it went. My GTX460 lasted well over two years after I baked it, but at that point it was time to upgrade that GPU anyway.