I've tried removing ram and booting, but no beeps or error messages, no bios at all. Have installed new ram, reset cmos, tried booting without hard drive or cd rom attached, still the same result. I'm thinking the MB has gone bad, but have no way of testing without buying a new one. I'll test the output voltages of the power supply next, but I'm at a dead end after that. Any ideas? Thanks in advance.
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Typically pressing F2 will enter the computer BIOS. Try striking the F2 key repeatedly just as you turn on power. If you are not able to access the BIOS screen then it is likely a power supply failure.
If you are able to access the BIOS con firm that the BIOS has found the HDD and reports on the drive. The format is different for every machine. It is either an IDE or SATA. The DHH that contains the boot sector and OS (operating system-windows) needs to be confirmed to be present in the BIOS for the computer to boot. The computer should still continue but issue an error message that no boot was found.
The fact that no beeps or lights come on and if BIOS is not accessible it would be power supply or motherboard. Remove plug from wall and allow to set at least a minute. Try rebooting.
If you are not able to reboot then you can assume that all of your files and documents are still safe. The concern is without technical experience going into troubleshooting the power supply or motherboard can put either your HDD or yourself in harms way. If you have a friendly computer repair suggest you get an estimate first of troubleshooting cost and have them determine the problem. If motherboard make sure that a replacement computer will take your HDD. It would not be installed as a OS boot drive but as a drive where yo could copy over all of your photos and documents into a new PC.
A good way to tell is disconnect your hard drive's, & CD/DVD ROM's power & data cable. Try to boot.
If you get the same results then you can try & remove any PCI cards from the board, remove your ram stick. Try to boot. If you get an error beep because you are missing ram than this is good.
Replace 1 ram stick back into your motherboard & try again. If it boots then you know the other stick is bad.
If removing all the non-essentials from your motherboard doesn't work then all you have left are the motherboard & power supply. A simply power supply tester or spare power supply will tell you if it is your board or not.
processor failure does not produce beeping sounds, are you sure that your extra rams are working? try to change the video card if you have the removable one. then if you're using the built in video card, try removing the sound card and modem cards or lan cards.beeping sounds is only for ram errors and any other hardware but not limited to motherboards. by the way try to clean the slot for rams, video cards and others. this would help.
Get him to remove and reinstall it sometimes the ram modules don't seat properly and give an error beep or don't let the computer boot .Also get him to check that it is the correct type and speed of ram for the computer he is installing it in .some mother boards are particular and need the exact type of ram .
If the issue was the video card then there would be no display. If there was any display it would be discolored.
Try unplugging any removable media that's hooked up to the computer. After that try to boot it up.
If it still doesn't go anywhere then you most likely have a power supply issue on your hands. try unplugging an unnecessary components inside the computer such as any CD/DVD drives and removing any cards installed. Pretty much everything but the motherboard and the hard drive. If it still doesnt boot properly then you might either have to buy a new power supply or a new motherboard as long as you know your hard drive is good.
The thing si if it was an issue with the hard drive you would get an error message. If you seemed to have left out any error messages please post them.
Disconnect everything from the motherboard except the power supply connections and cpu fan. Install one stick of RAM and connect your monitor. Then try starting up. See if you get any BIOS boot messages. This will tell you that the board and processor are okay.
With what you say you've tried already, I'm thinking you might have a bad processor. Most every other problem would result in some kind of error like POST beep codes or messages on screen. If the system still doesn't boot with the bare minimum parts installed, replace the processor.