Beep Code 1 3 2 on Dell Optiplex 790

Question

I have a Dell Optiplex 790 tower that will not post. I get a 1-3-2 beep along with the #1 light lit up. According to the Dell website, this means that there are 'No memory modules are detected'. I already tried reseating the ram, tried all four slots and every combination possible of those four slots. I tried taking one ram stick out and only having one in, then tried with just the other ram stick in and I get the same beep codes with just one and just the other. I also tried clearing the PC of any residual power, tried clearing the CMOS, I also tried wiggling the heat sink, pretty much everything that I could come across scouring the internet. Same beep codes I also tried using a can of compressed air to remove any dust that may be in there, and I shined a flash light in there and the slots are clean as can be. Same beep codes I am at a loss here, the PC worked two weeks ago so I have no clue what the problem could be. I doubt both ram sticks would go bad at the same time—especially when it worked two weeks ago. The light on the back is solid green. Is there any other things I can do to fix this?

gulzaib · Accepted Answer

Finally, I got my PC recovered.

I went to the market after having no solution to it. They told me that it's the BIOS issue. They furthermore asked me to do the BIOS, I let them do so. But it didn't helped me out.

I visited another repairer, he analyzed that the some of processor chip pins are damaged. He replaced the motherboard with new one along with extra 4000 Pakistani Rupees (1usd = 210pkr at that time).

In my case it was the board's issue but you can have a BIOS issue with 90% chances.

JOcean · Answer

With the #1 lit, is the power button amber colour? If so then that indicates a MB problem. The green LED on the back signifies that the PSU is working properly.

bradthetechnut · Answer

A bad battery can cause boot problems. I'd try replacing it with a new one (Energizer).

With PC off, push test button. Does it give the green light? This test doesn't necessarily mean that the PSU is good,* but that all of the peripherals are good. *Not saying PSU is bad.

Muhammad Zeeshan Azam · Answer

Hello Friend kindly comment here if you find any solution I am having same problem...

bradthetechnut · Answer

How to Run a Power Supply Unit Self Test On a Dell Desktop or All-in-One Computer  Dell BIST Test Video  (BIST = Built in self test)

Muhammad Zeeshan Azam · Answer

Thanks brother

user_44f3cf · Answer

I have the same problem....! No Dell again...this is my solution! Thanks and sorry....

Optiplex Desktops

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