No everything looks and smells normal. All lights and fans come on properly when the button on the back of the power supply is pressed. When the button is released it powers off.
first off all PCs do this, if you own one long enough (just like cars and all machines by man) they go dead.
ALL DO.
this is not hard at all to fix and to troubleshoot, any shop in town knows what to do. a fact.
the tests are called stripping PC down to minimum stated.
The PSU will not turn on if it sees any of its power rails are overloaded (this prevents the FIRE thing from happening and is by LAW ,NEC, UL, etc ,fire safety and fusing, rules)
In fact top makers of PSU have 5 levels of power protections , even undervolt, too.
Now armed with 2 facts, you can find the problem, that silly button on the rear only causes a force on state and is never latched ! by law. too.
The PSU can be bad, and gee yours is old, the PSU this old the CAPS in side dry out and or even short out.
CAP.s or Capacitors (are the lowest life parts of PCs, (just after batteries, 3 years old)
Left pc off for a day with no battery, put battery back in plug in and fans only go on for a very brief second and then off.
Stripped motherboard so only one stick of ram same result.
Tested PSU. 3,3 volt tested out at 3.36, 5 volt at 5.09 12 at 12.07 -12 at 11.9. Meter may not be entirely accurate.
Also tested 4 pin connector that has 2 browns and 2 blacks the browns tested out at 12.07
I do not know how to test PSU under load.
I also did the button push on the back of the PSU which seemed to powered everything but I got nothing on. monitor
Do I assume now that the motherboard has died? Or have I missed something.
If the motherboard has died any thoughts on the CPUs health.
Everything did work fin until I powered it off and the battery was dead before replacement.
Thanks
Stan
The fans should start up for just a few seconds when you plug the PC back into the wall after it's been unplugged for a while. When you plug it back in, the PC thinks it's recovering from a power failure, so it starts up briefly to read BIOS to see what it's supposed to do after a power failure.
By default, BIOS is set to "do nothing" when recovering from a power failure so the PC just shuts everything off again. (BIOS was reset to its defaults after you removed the battery and left PC unplugged over night.)
If you have an add-in video card in this PC (AMD or NVidia, and which card), did you connect the monitor to the add-in card and notto an onboard video port when you re-assembled things but got nothing on the monitor? The onboard ports are disabled when the add-in card is installed so you have to connect to the add-in card.
Start by physically removing the add-in video card and connect the monitor to either the onboard HDMI or DisplayPort, depending on what your monitor supports. Then reinstall everything else, RAM, drives etc. When everything is installed (except add-in video card), remove motherboard battery and press/hold power button on front of PC for ~30 sec. Reinstall the battery, close up and connect only mouse, monitor and keyboard. Reboot and report the results.
26Fm65
1 Rookie
•
18 Posts
0
December 4th, 2019 00:00
Do you smell any smoke/weird smell on your Power supply?
stanames
4 Posts
0
December 4th, 2019 05:00
No everything looks and smells normal. All lights and fans come on properly when the button on the back of the power supply is pressed. When the button is released it powers off.
Stan
26Fm65
1 Rookie
•
18 Posts
0
December 4th, 2019 07:00
Maybe time for buy a new PSU (do not attempt to fix the PSU)
there are a lot on sale during thanksgiving holiday.
savvy2
3 Apprentice
•
2.5K Posts
0
December 4th, 2019 07:00
first off all PCs do this, if you own one long enough (just like cars and all machines by man) they go dead.
ALL DO.
this is not hard at all to fix and to troubleshoot, any shop in town knows what to do. a fact.
the tests are called stripping PC down to minimum stated.
The PSU will not turn on if it sees any of its power rails are overloaded (this prevents the FIRE thing from happening and is by LAW ,NEC, UL, etc ,fire safety and fusing, rules)
In fact top makers of PSU have 5 levels of power protections , even undervolt, too.
Now armed with 2 facts, you can find the problem, that silly button on the rear only causes a force on state and is never latched ! by law. too.
The PSU can be bad, and gee yours is old, the PSU this old the CAPS in side dry out and or even short out.
CAP.s or Capacitors (are the lowest life parts of PCs, (just after batteries, 3 years old)
now the tests, we do the strip down next
first do the hard power reset.cured?)
no.
try again with no USB devices, USB things can short too, in fact all things electronic made can, and do. (luck/fate and age)
now do this.
the power button held for 5 to 10 seconds and release must run all FANS in the, for sure CPU.
if not this PC is called a power failure PC, by me , by dell and by intel, and the screen is DEAD>
power failure have 2 classes
PSU bad.
PSU overloaded (PSU new even) only a strip down proves what is shorted, on module at a time.
we assume the MOBO is ok, but do test ram. we assume all those things that plug in inside are bad first. proof.
DO NOT HOT PLUG anything inside, the PC, remove the line AC cord first. wait 5min. or do the reset above.
stanames
4 Posts
0
December 4th, 2019 08:00
Thank you for the information. I did a paperclip test and the green light on the power supply came on and the power supply fan was on.
I have removed the battery and will wait a day before proceeding to ensure that all power is drained before proceeding with your recommended tests.
Thanls
Stan
stanames
4 Posts
0
December 5th, 2019 10:00
Left pc off for a day with no battery, put battery back in plug in and fans only go on for a very brief second and then off.
Stripped motherboard so only one stick of ram same result.
Tested PSU. 3,3 volt tested out at 3.36, 5 volt at 5.09 12 at 12.07 -12 at 11.9. Meter may not be entirely accurate.
Also tested 4 pin connector that has 2 browns and 2 blacks the browns tested out at 12.07
I do not know how to test PSU under load.
I also did the button push on the back of the PSU which seemed to powered everything but I got nothing on. monitor
Do I assume now that the motherboard has died? Or have I missed something.
If the motherboard has died any thoughts on the CPUs health.
Everything did work fin until I powered it off and the battery was dead before replacement.
Thanks
Stan
RoHe
10 Elder
•
45.2K Posts
0
December 5th, 2019 11:00
The fans should start up for just a few seconds when you plug the PC back into the wall after it's been unplugged for a while. When you plug it back in, the PC thinks it's recovering from a power failure, so it starts up briefly to read BIOS to see what it's supposed to do after a power failure.
By default, BIOS is set to "do nothing" when recovering from a power failure so the PC just shuts everything off again. (BIOS was reset to its defaults after you removed the battery and left PC unplugged over night.)
If you have an add-in video card in this PC (AMD or NVidia, and which card), did you connect the monitor to the add-in card and not to an onboard video port when you re-assembled things but got nothing on the monitor? The onboard ports are disabled when the add-in card is installed so you have to connect to the add-in card.
Start by physically removing the add-in video card and connect the monitor to either the onboard HDMI or DisplayPort, depending on what your monitor supports. Then reinstall everything else, RAM, drives etc. When everything is installed (except add-in video card), remove motherboard battery and press/hold power button on front of PC for ~30 sec. Reinstall the battery, close up and connect only mouse, monitor and keyboard. Reboot and report the results.