Dell Precision T7500 is turning on, but no Display and cannot turn off.

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Dreznon

Dreznon

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Feb 20, 2016
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coreyeverett.artstation.com
Hello,

I purchased this from eBay and just got it in today. The GPU and Sound card were not in the ports all the way. The power to the second cpu riser was not in at all.

In my excitement, I turned on the computer without noticing any of those things were out of place. It would turn on and turn right back off. I then fixed what I seen and tried it again. Then I have what you can see in my youtube video. It is a minute and a half long.

https://www.youtube.com/watch?v=owBPAPTjPi4

I tried all display ports and DVI connections, nothing works.

I have not tried to apply new thermal paste to the cpu's, yet.

I have new ram and CPU's to install, but I'm not sure testing them out is a good idea.

Thanks
 
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The Paladin
my guts says it more likely a psu issues, but it is not impossible that it is the motherboard anyways; so I am suggesting you do this:
Since your got the motherboard, why don't you breadboard it besides your computer (i.e., slap cpu/ram on it, disconnect the psu from current motherboard and connect it to the new board, and use a video card on it) if it all boots, then it was the board, if it does the same issue then its the psu. (note if it doesn't boot it will show (if any) the errrors on the case led)
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Dreznon

Dreznon

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Feb 20, 2016
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coreyeverett.artstation.com
I found this page (http://www.dell.com/support/article/us/en/19/sln288786/precision-t3500-t5500-t7500-workstations-diagnostic-lights-and-beep-codes?lang=en) after I got the machine to power on and off. I got it to do this by plugging into the wall by itself instead of through my power strip.

My error is the 1 and 2 blinking. I have removed all extra components and have the same 1 and 2 blinking. Does this mean it is a bad motherboard?
 
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The Paladin

The Paladin

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1. clear cmos (i.e. unplug, pop motherboard battery 2-3 mins, put battery back in , plug in, reboot

2. make sure all the ram sticks are seated properly (if your video card wasn't chances are...)

3. you mentioned blinking, I will assume amber, that link you provided mentions "Blinking Amber — System fault error condition including Power Supply (only +5VSB working), Vreg failure, missing or bad CPU"
I would follow all the power lines to the motherboard, and makes sure (and there should be 2) are properly seated.
3.a you mention blink 1-2 leds :
Xh11yFJ.png


4. I have seen shipping a computer causes PSu to end up dead and need to be replaced.

5. the service manual can be found at https://www.manualslib.com/manual/553693/Dell-Precision-T7500.html

 
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Dreznon

Dreznon

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Feb 20, 2016
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coreyeverett.artstation.com
I'm not sure you asked any questions. I do have different CPU's I could try. I also have different ram I could try. The blinking lights are 1 and 2 and no amber light. I seen that diagnostic website too. I just do not know what exactly that means for parts. I disassembled the whole computer and cleaned everything. The problem persists. I will try the 2 new cpus and 6 new sticks of ram and give an update. It will be later tonight.
 
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Dreznon

Dreznon

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Feb 20, 2016
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coreyeverett.artstation.com
Funny thing. I got home and retried to turn on the machine. I got a 2 and 4 blinking light. I slid the extra CPU tray out and put back in. Then I got just a solid 2. I took the GPU's out and inserted them again. Now I have no service lights and running really loud fans with no post again (just like in my YouTube video). I put in my new CPU's (x5670's) and replaced the 12 sticks of 2GB RAM with 6 sticks of 16GB RAM. I kept the other 6 memory slots open. I retried to start the computer and same issue as in my YouTube video. I would like to know if it the Motherboard or PSU. I bought a motherboard already, but if you guys know it is the PSU then I would like to go ahead and buy that now. I do not want to wait to get this functioning. I need it desperately for a rendering machine. Thank you so much for your time.
 
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The Paladin

The Paladin

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Oct 5, 2016
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my guts says it more likely a psu issues, but it is not impossible that it is the motherboard anyways; so I am suggesting you do this:
Since your got the motherboard, why don't you breadboard it besides your computer (i.e., slap cpu/ram on it, disconnect the psu from current motherboard and connect it to the new board, and use a video card on it) if it all boots, then it was the board, if it does the same issue then its the psu. (note if it doesn't boot it will show (if any) the errrors on the case led)
 
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