1 Copper

Precision T7500 won't start after memory upgrade

I have a Precision T7500 (2 E5540 processors) with 6GB of memory and upgraded the memory with 4Gb more.

After I installed the new memory, the computer would power-up but not boot.  I took the new memory out, leaving only the memory that was in before the upgrade, and it still has the same problem.

I did a CMOS reset, but it didn't help.

I took all the memory out and started with 2GB only (1GB on MOBO and 1 on riser). Same problem.

I changed the 2 sticks with 2 of the others but it didn't help.

I tried with 4GB and the problem remained.

I'm following the manual's instructions on where the modules have to go.

The diagnostic lights are: lights 3 and 4 are on (memory failure); but the workstation is only two months old, so I don't see how all the modules would be bad.

The original memory is Elpida PC3-8500 (1066Mhz) DDR3 DIMM ECC (unbuffered).  The description on the module is 1GB 1RX8 PC3-8500E-7-10-DP.

The new memory I got is the same as above but made by Centon (the code on the module is totally different).

Thanks for any help.


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2 Replies
8 Krypton

Re: Precision T7500 won't start after memory upgrade

Hi, rpvs:

Try resetting the CMOS with the original RAM modules installed.

Also, I think you're far better off posting in the desktop general hardware forums.

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1 Copper

Re: Precision T7500 won't start after memory upgrade

Thanks for the reply.

I did reset the CMOS with the original RAM only.

I also tried taking the MOBO battery out for about 20 seconds while resetting the CMOS.

When I did that, the computer wouldn't not power up anymore. 

I called tech support of the place where I bought the memory.  The tech suggested that I tried starting with just 2 Gb on, and then add by increments.

Then the computer powered up again.  He was very helpful and looked up the diagnostic page on the Dell manual, but couldn't find a solution.

Thanks for the suggestion about posting on the general hardware forum.  I'm going to do that. 

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