Re: Dell Precision T3500 - 09KPNV motherboard repair
Hi!
I had to abandon this project because I lacked the time to do it. But it seems it is a common problem this motherboard: there are lots of boards with the VRMs and other components around the CPU replaced. It seems it's beyond my abilities, as I could never find the schematics for this board.
Thanks a lot!...
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Re: Dell Precision T3500 - 09KPNV motherboard repair
Thanks a lot!
Haha, I now understand it was really thin. Like a "hair" of wire. No surprise it has gone bananas.
I have one good and one bad board. I acquired the good one for comparison purposes.
All the measurements I did on the caps behind the board were done with CPU installed. I have to mention that the CPU *barely* heats , although I have no idea if that's consequence of low or none voltage (most probably) or if it does not have time to heat up.
As soon as I can...Last edited by wasserprojekt; 05-22-2021, 10:36 AM.
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Re: Dell Precision T3500 - 09KPNV motherboard repair
Good afternoon!
I was able to get a fully working motherboard for comparison.
I tried your suggestions! Starting by trying to plug just the 24pin ATX connector without connecting the 8pin CPU connector, the motherboard behaved exactly as before. I mean, it started, no beeps, four seconds, shuts off. Because the CPU and Case fans are connected to the 12V power rail that feeds the CPU (and as expected they did not start), I connected one fan to the HDD fan connector (which is powered by the 24-pin cable...Last edited by wasserprojekt; 05-22-2021, 06:35 AM.
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Re: Dell Precision T3500 - 09KPNV motherboard repair
Could You please give me some insight over the choice of components to try the replacement? I am having difficulty on identifying the inductor specifications, as I cannot find anything on the component which could help me identify it. I believe it's a SMD ferrite inductor, but no more than that....
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Re: Macbook/Pro/Air Schematics and/or Boardviews
Sorry for wrong post placement. Asking for admin to move it to right location. Thanks
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Re: Macbook/Pro/Air Schematics and/or Boardviews
Mbp 820-3115b
mbp 820-3330b
mbp 820-3332a
mbp 820-3462
mbp 820-3476a
mbp 820-3536
mbp 820-3787a
mbp 820-4924a...
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Re: Macbook/Pro/Air Schematics and/or Boardviews
Mbp 820-2530
mbp 820-2610
mbp 820-2849
mbp 820-2850
mbp 820-2879
mbp 820-2914
mbp 820-2915
mbp 820-2936b...
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Macbook/Pro/Air Schematics and/or Boardviews
Macbook/Pro/Air Schematics and/or Boardviews
MB 820-2877B
MB 820-3642A
MBA 820-00165
MBA 820-2796
MBA 820-2838
MBA 820-3023
MBA 820-3023A
MBA 820-3024
MBA 820-3208A
MBA 820-3209A
MBA 820-3435B
MBA 820-3437B
MBP 820-2279
MBP 820-2330
MBP 820-2390
MBP 820-2496
MBP 820-2523...
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Re: Dell Precision T3500 - 09KPNV motherboard repair
Thank you for your answer!
I will check the Vcore voltage and I'll report back later. But although I get voltage on the capacitors just below the VRMs, I don't in the MOSFET themselves (can be that I don't know how to measure them as I should haha).
As for that cap/inductor/unknown-motherboard-object, couldn't it be a major problem? The other systems have it, and it was the only component at least visually damaged. Isn't it possible that is an inductor like Schorsch87 said? Without the schematics I'm...Last edited by wasserprojekt; 05-04-2021, 10:30 AM.
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Dell Precision T3500 - 09KPNV motherboard repair
Hello!
I've been given a batch of 3 Dell Precision T3500 in pretty bad shape. After cleaning all the hardware, most of components were working but one graphics card and a motherboard. I used one of the working motherboards to test all the memory modules, all PSUs, the CPUs and expansion cards.
I am trying to ressurrect the broken motherboard. No beeps but fans work. Computer turns on for three seconds then shuts down. Board's amber LED behaves as expected. Board's green LED near motherboard PSU connection turns on when board's powered, as expected, then turns off when it shuts...Last edited by wasserprojekt; 05-04-2021, 04:44 AM.
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