"i can find my dmm?" did you mean CAN'T?
"its clearly off", what is off?
the fans are 3 pins,2 are power, one is RPM tachometer.
"it all works fine", so you can boot and run any OS, ?
"the voltage reads +12vdc", where, at fan or PSU?
the fans run off 12vdc, they are DC motors (from outside fan)
if the fan runs slow at 12vdc the the fan is bad or is a low RPM
fan, as some are, bigger fans run slow, for less noise.!
first is the CPU fan it must run full speed, if not the CPU will overheat in seconds and ALL CPU shut them selves (by there selves) this way. so CPU fan is first. what does it do... there....?
then BIOS screens. GOT BIOS UP? and running? with, ESC key pressed>.
let me guess your symptoms
1: PC dead. will not boot.
2: BIOS dead.
3: all fans DEAD,.
4: power switch works and all PSU voltages read right, (seems not)/?
5: if the PSU power wire reads right(DMM), matching the side sticker voltages, and the CPU is dead, the MOBO is dead, or CPU is toasted.
here is a modern PSU, sticker.
see 5 to 10 power lines, see them. all must read correctly
if a fan is dead, then its dead if 12vdc is present on the fan power pins.
SOURCE: hp a705w desktop (pc on fan on but no signal to other locations)
Hi there.
The best way to check if the processor is at fault is turn the machine on for a couple of minutes, then turn it off.
Disconnect the CPU fan and heatsink and feel the processor, if its warm or hot then the processor is fine.
In most cases its the bios chip which is down so if you can clear the CMOS or remove the power cord from the back and take the motherboard battery out for half an hour.
See if that gets you anywhere.
Good luck and thanks for choosing FixYa!!
SOURCE: p4sd socket 478 motherboard is not booting up at all !!!
1st check if the voltage from the plug has correct groung , neutral phase set .then
try a new smps , with minimum 400W output.
before connecting the same.
please remove all the parts out of the cabinet please connect only motherboard and smps and check its getting switched on , if not then your board is burnt you will have to replace it , if there is power indication then connect the RAM and check , if its also fine then connect the rest and try.
all this u have tried and no use , please post me a msg with full detail of your PC configuration , I can try a resolution
dil.
SOURCE: I have an HP Pavillion
Do you have the Restoration Disk?
You have corrupted basic Windows files. How? Windows is a funny animal. That, and viruses just drive Windows users crazy.
The Restoration (CD) Disk has the basic Windows files. You can do a Repair.
Start the computer, insert the Restoration Disk in the optical drive. Close the drive tray.
When asked perform a Non-Destructive Installation.
Don't have the Restoration Disk?
Contact HP Support.
The disk/s are free. The shipping and handling is not.
In the US the phone number is 1-800-474-6836
It's $17 for a 5 to 7 day ship, $24 for a 2 to 3 day ship.
Not in the US?
Here is the HP Support Worldwide contact page,
http://welcome.hp.com/country/us/en/wwcontact_us.html
Testimonial: "Great Thanks!!!"
SOURCE: Stationed in Afghanistan. Have a
Hello Stephen
The problem could be with your SMPS which might not be providing 5 Volts to check the Power Good State of the Devices.
Let me know if you have changed the UPS.
Rgds,
Prashanth.
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