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Cpu wont start :(

This is a discussion on Cpu wont start :( within the RAM and Power Supply Support forums, part of the Tech Support Forum category. hey guys , i got this problem and searched all over the forums to find a solution but no luck


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Old 08-21-2009, 01:40 PM   #1
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hey guys ,

i got this problem and searched all over the forums to find a solution but no luck

here it is

My desktop computer wont start .. its an Hp a1640n Core 2 Duo , 2 Gb ram, Integrated graph card
The problem is that i turn on the pc, the keyboard/screen lights on for like 1/2 a second then it lights off
I cannot hear any Beeps ( so no BIOS access or anything on the screen )
The fan works properly ( i can hear both of them and i can see them working ) and theres power runing the tower

I tried to remove the RAM, the Hard disk, Reset the BIOS, change RAMS ... no change at all

IMPORTANT NOTE: After 1 month of inactivity, my friend and i tried to turn it on and it worked ( perfectly but was stuck on the anti-virus so we restarted it
and the same problem occured after ) --->>> so i doubt its the Mobo cuz theres no way it would work once if it was fried



sooo.. is this a Mobo problem, or a power supply??
or could it be the power supply isnt well connected ( it worked once! so its not "broken" )
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Old 08-21-2009, 02:12 PM   #2
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Is the CPU heat sink tight to CPU? Check that all 4 legs at firmly attached to the motherboard.
Do you have access to a digital volt meter?
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Old 08-22-2009, 12:14 AM   #3
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nop.. no smell at all ( smell normal and good computer :D )
all legs attached .. we checked

i have acccess to a volt meter but i got no idea where to put it in the pc





if a mobo is fried, thers no way it would have worked like all of the sudden ( 1 month of inactivity )... right??


if a mobo is broken, it is simply broken and cannot magicly be good again in 1 month ... but not the same with PSU?
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Old 08-22-2009, 03:02 AM   #4
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Use the volt meter and follow the instructions here> https://www.techsupportforum.com/f210...er-151526.html

Normally if the motherboard is bad it's bad, but stranger things have happened.
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Old 08-29-2009, 11:06 AM   #5
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nothing shows on the voltmeter :(
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Old 08-29-2009, 01:04 PM   #6
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If the PSU is plugged in the switch in the back is turned on(if it has one) you should at least have +5v standby(purple and green wires) if not the supply is bad.

What Video card are you using?
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Old 08-29-2009, 10:55 PM   #7
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i got integrated graphic

can u remake ur ssentence, i can harly understand it :(
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Old 08-30-2009, 02:06 AM   #8
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If the Power Supply is plugged into the wall and turned On, the Purple wire should read 5v if not the Power Supply is bad and needs to be replaced.
For integrated video this one will do > https://www.newegg.ca/Product/Product...82E16817151060
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Old 09-14-2009, 03:43 PM   #9
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heres an update ...
i sent it to a friend to repair ... we tried switching power supplies but no success ..

however, when i came back home ( after putting back the original power supply ) , it was working!!! i sensed it going a bit slower than usual ...
for abt a week, it went fine ( opening everytime ) but then once in a time, it would do the same problem ( nothing showing on screen, screen turning on when power was on, then screen turning off ( as if power was turned back off ) )

i buypassed that by rebooting and sometimes switching the plugs on the wall.. but lately, it began to work less and less.. and now, it never works .. same problem as b4..

any ideas? :(
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Old 09-14-2009, 04:01 PM   #10
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Check the power connectors on the motherboard for signs of damage.
Also check the capacitors for any signs of leakage or domed tops.
https://www.badcaps.net/pages.php?vid=5
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