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39981
August 7th, 2015 18:00
Precision T3400 power issues
We suffered a power glitch a couple of weeks ago and my system went south even though I had it on a very reliable surge suppressor.
Then it would not power up so I purchased a replacement power supply, installed it and still no power.
I see the orange light on the MB but when I press the power button, nothing. If I hold down the reset button on the power supply, I can get the power to come on but it immediately goes back off...
Any ideas as to what may be the problem?
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DELL-Hemalatha
4 Operator
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2.8K Posts
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August 7th, 2015 20:00
Hi
As the PSU is already replace but issue still remains the same, suspecting motherboard to be faulty.
But, have you tried to remove memories and HD and power up the machine.
Regards
speedstep
9 Legend
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47K Posts
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August 7th, 2015 22:00
The video below explains the Test procedure.
The LED on the back does not mean that the power supply is good.
The BIST (Built in Self test) is what that LED and button are for.
Power Supply Self Diagnostic Features
Some Dell computers have power supplies that include a self-diagnostic feature. The test button for the power supply is visible on the back of the system. This LED is not the same as the flea power LED on the motherboard (which also only says +5VSB is working NOT the Power supply is OK). Press and hold the self-diagnostic switch on the power supply -
* If the LED stays green, the supply is functioning
* If the LED stays off, get the power supply replaced
MrBaseball59
4 Posts
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August 9th, 2015 09:00
Ok, same issue. I will track down a MB for this system.
MrBaseball59
4 Posts
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August 9th, 2015 09:00
I didn't think system would boot, even to POST, without memory but I'll give it a try. I have replaced memory with some from another system, same problem exhibited.
MrBaseball59
4 Posts
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August 9th, 2015 09:00
Yes, light stays green so PS looks ok.