Dell T7500 won't start

October 31, 2009 at 09:29:42
Specs: Vista 64 bit
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.


See More: Dell T7500 wont start

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#1
October 31, 2009 at 09:40:52
make sure you install the modules properly

do you hear any beeps ?


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#2
October 31, 2009 at 10:03:43
I am being very careful about how I install the modules (I
have done memory upgrades several times on other
machines). I follow the manual's instructions. It's a dual
quad core with a memory riser. I put the sticks in MOBO 1,
riser 1, MOBO 2, riser 2, and so on.
No beeps.
But what's surprising is that after I took out the new memory
sticks, leaving only the sticks that were there before in their
original location, the problem persisted.
I took out all peripherals, leaving only the graphics card in.
I was on tech support with the place where I bought my new
memory. The tech really tried to help but couldn't find a
solution.

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#3
October 31, 2009 at 10:11:11
please take out all the RAM

then try to boot...

...do you hear any beeps ?...


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Related Solutions

#4
October 31, 2009 at 10:31:13
I took out all the RAM. No beeps.
Also, if this can help:
When I powered up before this problem came up, the fans
would go on for a short time, then they stopped. Now they
keep on running non-stop until I shut off the machine.

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#5
October 31, 2009 at 10:34:09
good news : the RAM is not the problem

bad news : it`s CPU and/or MOBO


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#6
October 31, 2009 at 10:41:10
Just what I was hoping would not to be the case.
That's the expensive stuff.
How can RAM have caused a problem with CPU or MOBO?

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#7
October 31, 2009 at 10:45:59
you can`t ever now...happens...

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#8
October 31, 2009 at 10:50:24
I guess the next step is to bring it to a shop for testing.
Thanks for the help.

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#9
October 31, 2009 at 10:53:07
you`re welcome

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#10
October 31, 2009 at 11:45:09
It could be a power supply problem. Try swapping it first.

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#11
October 31, 2009 at 11:55:28
Thanks!
I'm still hoping it's something minor like that.
I contacted a repair shop and they'll test it Monday.

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#12
October 31, 2009 at 12:10:05
...please, let us know...

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#13
October 31, 2009 at 12:16:54
Yes, I will.

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#14
November 2, 2009 at 15:17:45
I brought it to a shop today, where the tech started looking
into it.
This computer is a dual quad core and has 3GB memory on
the motherboard (for one processor) and 3GB on a riser (for
the other processor).
He got a signal on the monitor by taking out the riser and
using the MOBO memory only. That says that the
motherboard should be good (?) and that at least one
processor is working.
When he puts the riser back on (with the 3 GB of memory on
it), the problem comes back: no output to monitor, the
computer powers up but the fans keep on running non-stop
at high velocity.
That could mean that some memory on the riser is bad (I'll
know tomorrow). It could also mean that one of the
processors is bad.
The question is, what would cause the whole system to shut
down when the riser is back in (why can't it keep on working
with just one processor).
I'll be out on a job for the next few hours, so I won't be able
to reply right away to any question, but any input is
appreciated.
Thanks!

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