a few months ago when i returned off holiday and pluged my pc back into the mains i noticed the power button on pc did not work first time and i had to wait about 10 seconds before it did, i knew the battery had gone because time/date had reset, but stupid me did not replace it. then a couple of weeks ago the above happened again when i returned off holiday but again continued to work. then last night i unplugged pc by mistake and when i tried to turn it on this morning the fans and drives powered up but no signal was sent to the monitor and no beeps so i am assuming post did not start. i attemted to restart on a few occasions but now nothing happens when i switch on, no drives or fans ect, but there is power to motherboard led. could the battery now be total flat and with no bios could it prevent pc from starting. i am new to this and probably got it tottaly wrong can anyone please help
2007-01-12 21:05:48 · 11 answers · asked by Jaimie H 2 in Computers & Internet ➔ Hardware ➔ Desktops
Bios is not held in the battery. Could be a bad power switch. Just a bad bios batt shouldn't keep your pc from starting, it just wouldn't hold a date or time, but it would do SOMETHING. As well as the power switch, could be the power supply too. You can also try re-seating your memory, sometimes that helps as well. But it's probably the switch or the power supply.
I have seen dead power supplies before with LEDs that light the motherboard. A power supply has +5v -5v -12v +12v, losing one of these can give you the type of problem you are experiencing. But still light the LED on the board.
2007-01-12 21:23:38 · answer #1 · answered by binaryking 3 · 1⤊ 2⤋
If you didn't hear any fans running then I would get a new power supply, that is not to say that will cure the problem for sure. Next the CMOS will need to get changed just to make sure you get a BIOS beep code to see where you are at with all this stuff. The power supply went dead when you left it on for long periods of time which can wear it out . Others may disagree with me on this one, and that's cool. Your not getting any beeps was because the CMOS was dead enough to the point that it couldn't send out any codes. The ROM chip is non volatile chip that holds programs so that your computer knows what to boot up first and last. I read in a book written by Scott Jernigan that the BIOS plays a huge part in the boot process. Take care..
2007-01-13 20:09:38 · answer #2 · answered by ironhorst71 2 · 1⤊ 0⤋
Ok, No fans means the PSU fan is shot but still working. Over heating took place as a result of shutting down. Replace the PSU and re-connect it to the motherboard. Then turn it back on see if you hear the CPU fan running at all. If not replace the heat sink and fan. Then replace the battery change the date and time. I have seen this happen over and over again. I would like to add a few more things. The ROM chip BIOS is what keeps the programs such as the boot order power settings ETC ETC and with out this the CPU can not tell the hardware what to do that is why they call it the BIOS (Basic input output system).. So if the battery isn't strong enough to keep the ROM (BIOS) CHIP running or active Then the instructions the cpu sends to the hardware will not complete its boot. This is why they call it POST (power on self test) So the only reason I get a thumbs down isn't because I am wrong, it's because my answer does not line up with there answer. So I don't care if I get a thumbs down. Keep in mind I have fixed computers in college that had the same identical problem. That is why I say "I have seen this over and over again."
2007-01-12 22:23:00 · answer #3 · answered by Anointed71 4 · 1⤊ 3⤋
Here is the deal apart from the mother board, cpu and memory no harware would stop pc from booting up. Even if you had faulty memory it would beep. So we are down to mtherboard and cpu. Battery will not effect the boot since it only powers bios when the pc has no power source. Flat battery will just reset defaults and nothing else. Mother board led will light when you plug the power cable regardless of boot issues it only indicates power is reaching the board. Power switch is one other thing you can check. Move the cmos jumber and move it back. (The one with three pins and a jumper near the cmos battery.) If all dont work try a different processor, then, only then, you can come to the conclusion you have a faulty mother board.
2007-01-13 00:44:59 · answer #4 · answered by ? 2 · 1⤊ 3⤋
The small battery on the mobo is just to keep your BIOS info and the date, unplugging shouldn't effect it at all. If your getting a light then there is power to the mobo. I would take out the old battery from the mobo and replace it. Try rebooting and going to your BIOS and loading old values (if it will) if not load optimum values, then try to boot. If nothing still, no fan power or anything, take it to a shop. If your system had power to the board and you ran it without the fans going you may have over heated a chip or your processor. It's basically a process of elimination, for myself, I would have to look at it in person to fully diagnosis. You may have to take it in.
2007-01-12 21:26:24 · answer #5 · answered by Mt ~^^~~^^~ 5 · 1⤊ 3⤋
could be the CMOS battery but they can last a good 6 years easy.
I would pull all the PCI cards out, re-seat the RAM, check all connections and disconnect the hard drive and see if you can boot to a floppy
2007-01-12 21:23:54 · answer #6 · answered by lv_consultant 7 · 0⤊ 3⤋
yea the battery could be the problem. just check your connections before exploring the battery option! However, it does sound like the battery.
2007-01-12 21:13:02 · answer #7 · answered by fluffypurplealien 2 · 0⤊ 2⤋
if there is fan activity in both fans, then check your ram. ram is the main problem if basic startup fails. if ram isnt an issue, then like wat the top guy said, reconnect everything. if your power box fan isnt working, its the power box issue.
in short, check your :
1) power box fans(not your cooler fans)
2) ram
Battery shouldn't be the one causing a powerup failure.
2007-01-12 23:55:45 · answer #8 · answered by Just Me 5 · 0⤊ 3⤋
Your Mainboard has failed.
If it 's a warranty issue contact the repair agent. Otherwise contact a repair facility.
2007-01-12 23:28:58 · answer #9 · answered by Gowrie 3 · 1⤊ 3⤋
i would disconect and reconnect every thing, and see if that helps, the power swicth also sounds dodgy.
2007-01-12 21:27:20 · answer #10 · answered by Anonymous · 1⤊ 3⤋