PC won't even turn on
Tried a new power supply, same issue. The fan rotates on the PSU, the motherboard power LED comes on, but nothing happens when the power button is pressed other than the PSU fan coming on and off.
ASKER
I can't even get the thing to turn on. Can't access the BIOS or anything. Replaced the PSU.
Hi
If you don't know or can't find the Pins you need to jumper to reset the BIOS, just remove the battery for the BIOS and put it back in. That should reset. It probably isn't going to do anything, but it's worth a try.
I'm thinking about other things to try.
If you don't know or can't find the Pins you need to jumper to reset the BIOS, just remove the battery for the BIOS and put it back in. That should reset. It probably isn't going to do anything, but it's worth a try.
I'm thinking about other things to try.
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Hi Tymetwister
The PSU was a sensible 1st option to replace. However, as that's not fixed the issue, it looks now like it's either a blown processor or motherboard. Realistically, the pc is trashed.
The PSU was a sensible 1st option to replace. However, as that's not fixed the issue, it looks now like it's either a blown processor or motherboard. Realistically, the pc is trashed.
First off is this a new system or an old system with a new PSU ?
Either way check that all plugs from the PSU are in the Mainboard espcially that four pronged molex plug that fits in separate from the main power (It goes somewhere else on the board, often near the CPU)
Either way check that all plugs from the PSU are in the Mainboard espcially that four pronged molex plug that fits in separate from the main power (It goes somewhere else on the board, often near the CPU)
Make sure that all pins from the PSU is connected ot the motherboard specially the atx pin.
If everything has been verified last thing I suggest is to short the black and green pin on the 24pin atx connector. How? disconnect the 24pin or 20pin atx connector (depend on your motherboard) then get anything that you can use to short the two pins (I use paper clip) and your computer should turn on. This is good as turning your PC on using the power button. If this will work there is a problem with your main power button connector.
You should then check your motherboard manual to double verify the exact connection of the main power connector pins. There are labels on the connector pins and motherboard jumpers as well make sure they are correct base it on the manual.
If this doesn't work you may have a bad motherboard caused by power surge or lightning storm. Look for a swollen or broken capacitor normally that is your indicator as explained by uucknaaa
If everything has been verified last thing I suggest is to short the black and green pin on the 24pin atx connector. How? disconnect the 24pin or 20pin atx connector (depend on your motherboard) then get anything that you can use to short the two pins (I use paper clip) and your computer should turn on. This is good as turning your PC on using the power button. If this will work there is a problem with your main power button connector.
You should then check your motherboard manual to double verify the exact connection of the main power connector pins. There are labels on the connector pins and motherboard jumpers as well make sure they are correct base it on the manual.
If this doesn't work you may have a bad motherboard caused by power surge or lightning storm. Look for a swollen or broken capacitor normally that is your indicator as explained by uucknaaa
To isolate the problem, first disconect all devices (hard drives, cd roms, pci and agp cards, (Modems and network cards are most frecuents shorts circuits sources because external connections) if not start, try other power source, (the four pin connector suplies directly the cpu), other cause must be the cpu fan, if the mother board sensor not detect that fan starts inmediately, the chipset shut down the power supply.
check the big capacitors in mother board, the cap of these capacitors have a small indents that acts as "fuses" opening the caps to prevent explosions. any bents or holes in capacitor's caps are signal of damage.
don't forget to chek if the voltage selector in power supply is set to 220v instead 110V
and check to if that power supply deliver the power demanded for the system.
check the big capacitors in mother board, the cap of these capacitors have a small indents that acts as "fuses" opening the caps to prevent explosions. any bents or holes in capacitor's caps are signal of damage.
don't forget to chek if the voltage selector in power supply is set to 220v instead 110V
and check to if that power supply deliver the power demanded for the system.
It is certainly sounding like a blown motherboard.
I have to say, with reference to the first comment, some may call it the CMOS, but the BIOS and CMOS are two separate entities.
http://www.computerhope.com/issues/ch000707.htm
I have to say, with reference to the first comment, some may call it the CMOS, but the BIOS and CMOS are two separate entities.
http://www.computerhope.com/issues/ch000707.htm
Hey ..
E-Z-PC .. thanks for the clarification. It's much E-Zier to have the one to refer to.
Tymetwister .. try reseting that one. It'll either have a jumper you can change to reset it or removing the battery accomplishes the same thing. Your manual will explain the process. By the way, what kind of PC are we dealing with here? How old is it? Any warranty left?
You had any success yet?
E-Z-PC .. thanks for the clarification. It's much E-Zier to have the one to refer to.
Tymetwister .. try reseting that one. It'll either have a jumper you can change to reset it or removing the battery accomplishes the same thing. Your manual will explain the process. By the way, what kind of PC are we dealing with here? How old is it? Any warranty left?
You had any success yet?
uucknaaa - I always call it the BIOS, seems to be what the majority understand.
I'd like to see a positive outcome to this, as I have the same issue with a clients PC.
I'd like to see a positive outcome to this, as I have the same issue with a clients PC.
Great ..
E-Z-PC .. sounds like a plan. Sounds like you're waiting for something to try on your clients machine.
I just thought of one. On most of the newer motherboards, when you provide power to the system, and before you turn it on, there is usually a light on the motherboard somewhere. If the motherboard is completely fried, this light usually isn't on after plugging in the power.
Tymetwister .. do you see a light on the motherboard when you plug in the power but before you try to turn it on?
E-Z-PC .. sounds like a plan. Sounds like you're waiting for something to try on your clients machine.
I just thought of one. On most of the newer motherboards, when you provide power to the system, and before you turn it on, there is usually a light on the motherboard somewhere. If the motherboard is completely fried, this light usually isn't on after plugging in the power.
Tymetwister .. do you see a light on the motherboard when you plug in the power but before you try to turn it on?
In technical terms - sounds like it is buggered!
ASKER
Strangely this solution worked. Never came across it before. Thanks.
Have you tried reseting the BIOS ( some call it CMOS)?
Let me know.