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computer not power on can be caused by 2 thing, first is your power supply was dead, and the second is your motherboard was broken
try to connect another power supply, if your motherboard can power on it mean your power supply was dead if still not power on it mean your motherboard was dead, change the motherboard with new one
The average desktop motherboard has tested support for 4GB of RAM. Look at the RAM in there now, and go to an electronics store. Go to the clerk and say you need this kind of RAM. It should have a little serial code on it somewhere.
You could probably put more than 4GB of ram in w/o anything bad happening.
Seems like the motherboard is broken...
Yous hould first try the PC with another motherboard, if you have one and are able to switch all the components.
If then the PC boots, the motherboard is broken. You could try taking it to a computershop, maybe they can spot a problem, but I guess if something, like a fuse or a single wire, burnt through the only way to fix it is to replace all of them, which would be more exoensive than a new motherboard.
If you need any help finding a new motherboard just ask me.
Try to replace the power supply with another known working power supply from another P4 desktop and then reconnect your wires from the front panel led lights, changing them around until they are in the correct position. I had an almost similar problem and I did the above, it is working now. All the best !
Hello all. I have the same issue. My MB is 845G [P4 2.4 Ghz] and SATA harddisk I need to install is Seagate 250 GB Baracuda with 3.0Gb/s interface, I belive which makes this HD as SATA II. So for this motherboard should I prefer PCI cards which support SATA II over the supports SATA I [these are cheaper].
Either motherboard, ram module or if no power at all sounds more like a power supply. If the computer has on board video you will need the ram to get any video. But with it removed the board should still beep if the case speaker is connected to the board. Have seen a lot of these less expensive motherboards fail. If there is no power up at all or lights coming on on the case I would think it is a power supply problem. Happens all the time and quite easy to repair. Just put on a new power supply.
Testing motherboard components is beyond most users and computer shops these days, especially when it costs more to test than a new board. What you can do is do a visual inspection for physical damage; common items are
-capacitors with rounded tops or corrosion at the base
-burnt or scorched components or spots on the motherboard
-corrosion on the motherboard especially around connectors, solder joints and the CMOS battery.
On machines that sit idle for some time when I find physical damage its typically from high humidity, power spikes, dead CMOS batteries and damaged capacitors. Even if I find something physical I will usually replace the motherboard rather than try to fix it and run the real chance of it failing again. More often than not the physical problem we find is usually a symptom and not the actual underlying cause. Since the cost of repair parts is small compared to my labor its more cost efficient for my customers to replace the defective part with a new, warranted part. That minimized the chance of having to pay for my labor again.
On the other hand if you want to experiment for the experience then go at it and have fun. Soldering correctly without damaging the part or the board is an definitely an art that takes time to learn.