Question about Dell Precision Workstation 490 - MT - 32bit Dual Core Intel Xeon Processor 5120 1.... PC Desktop

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Why won't t3500 power on? - Dell Precision Workstation 490 - MT - 32bit Dual Core Intel Xeon Processor 5120 1.... PC Desktop

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Most likely cause is the power supply, if it really wont turn on, if it comes on but doesnt start, the you have a computer problem. Check and see if the fans work when you push the power button or if any lites come on, then the power supply is most likely OK. If the computor does actually come on, but does not start, see how may beeps it makes. then repost your question with that info.

Posted on Dec 28, 2014


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To work around the hibernation (S4) problem, temporarily turn off the Hibernation feature. To do this, follow these steps:
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Jan 01, 2011 | Dell Precision T3500 Computer Workstation...

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Dell T3500 with E139765 on motherboard. LED on motherboard is yellow & system will not boot up.


Try the steps given below and it should resolve the issue;
1. Turn off the computer - unplug the power cable
2. Press and hold down the power button for 1 minute with power cable unplugged
3. Release the power button
4. Reconnect the power cable and turn on the computer
5. Dell ought to boot in Normal Mode

Lemme know the results.


Anirban Mazumdar

Dec 04, 2010 | Dell Precision T3500 Computer Workstation...

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