PC not booting up at all

Posted on 2006-05-11
Last Modified: 2010-03-19
I have P4 is not even powers up. What is the first step i should start checking.

1. AC is fine. Which shows that electic part is fine.  I need to find quick resolution. Can someone assist?
Question by:ittechlab
    LVL 13

    Expert Comment

    Check, test and/or replace power supply.
    LVL 10

    Expert Comment

    Usually power supply or motherboard. Check one then the other.

    Author Comment

    After i changed the power cable, its started and shut down after 30 sec.
    LVL 5

    Expert Comment

    I tend to lean toward processor problems with intermittent failures. I would try disconnecting drives PCI/AGP cards and monitor how long it holds power.
    LVL 13

    Expert Comment

    by:Nick Denny
    Power supply blowing fuse in mains lead..... (if there is one)  ergo: faulty PSU  ???
    LVL 13

    Expert Comment

    Do you have a power supply tester?  They are relatively cheap and you should be able to get one from CompUSA etc.

    LVL 4

    Expert Comment

    Is your LAN card one aof those with LED that when Ethernet cable is plugged in it ligths up, if you see a LED on then your motherboard **probably** is OK, and you processor is the problem, most likely.

    FYI I worked on a PC today with same description and just changed the Proc, and everything started to work again..

    Hope to help

    LVL 87

    Accepted Solution

    Take your mainboard out of the case and only leave the CPU and one RAM module and the VGA card on it. Then connect it to the PSU (make sure you also attach the 4-pin connector which supplies the CPU and probably is also close to the CPU. If the PC starts now, add the other hardware one by one and allways try booting again...

    Expert Comment

    Is the fan on the cpu spinning up and freely?  Also, make sure it's not completely clogged w/dust in the heatsink that attaches to the cpu.  I would go to and get a $15 power supply and switch that out.

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