Inspiron 3891 Power Troubleshooting

Question

Good evening Community,

Inspiron 3981, running flawless for a couple of years. Really a solid PC IMHO. Until now... PC was shutdown for 3 hours, moved into the spare office, plugged in to the wall outlet. No boot, no post.

Bought replacement PSU and installed. No boot/start/power on. I have seen articles about the PSU having a reset button, My PSU does not. I followed what I could find regarding reset still no luck plugged the power into the PSU LED goes green for 1.5 seconds and then shuts off. This of course is after I've disconnected all peripherals with and without memory etc. please give me any type of solution or steps I may have missed.

anne_droid · Answer

Hi

Errrrrrr a tad tricky to suggest a problem with your wall outlet, but I will.

Move it back to the original wall outlet?

Any noise, change of screen hue? Anything at all suggesting there is an attempt to post (apart from a brief green LED)?

Re-seat all internal components, although I note you have removed most/all of them.

CMOS coin cell battery?

redxps630 · Answer

Turn off your computer. Disconnect the power cable from the PSU and wait for 15 to 20 seconds. After 15 to 20 seconds, reconnect the power cable to the computer. The LED light should turn on for 3 seconds and then turn off. If the BIST LED turns on, your power supply is delivering power to the computer. If the BIST LED does not turn on or the PSU fan does not spin correctly, your power supply is not delivering power.

redxps630 · Answer

If psu is good open pc to replace CMOs battery. Then reset RTC

Turn off the computer.
Ensure the computer is connected to a power outlet (AC power).
Press and hold the power button for 30 seconds.
Release the power button after 30 seconds.
The system will turn on and off automatically multiple times.
The Dell logo screen should appear once the reset is successful.

(edited)

steverinaz · Answer

Truly, tell me that the cmos battery could be the culprit? I'm pursuing one today, thought I had a couple in my tool bag, there's none.

I'm a contract premium certified partner and Field Service Engineer for one of the largest data center solutions provider in the world. Updates later. Ty!

redxps630 · Answer

When pc was moved from one location to another it had power cord unplugged. One possibility is that cmos battery by itself  could not retain cmos settings which may caused loss of RTC. Not saying this is definitely the cause of this case, but replacing battery is an easy step.

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Inspiron 3891 Power Troubleshooting

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