Desktop
a friend bought a second hand computer, there was a password in the bios, i moved the onboard jumper to clear cmos and removed the battery. now the computer just sits there , any ideas anyone. is there a UK firm that will flash the bios for me
thanks Dave
by lumberjack
It is v unlikely that you have removed the BIOS - just reset it
things to try
1) Get new battery and install
2) put jumper back to original position
Boot up - does the PC beep at all?
3) can you access BIOS at all?
by cg it
I hope that you turned to computer off when you cleared the CMOS table via the jumper, then returned to jumper to the off position. Clearing the CMOS via the jumper with the power on or leaving the jumper in the clear position and powering on the computer will cause damage to the BIOS.
If you powered off the computer and cleared the CMOS table via the jumper [and removed the battery] put the jumper back to the off position and replaced the battery, then powered the computer back on, you should at least see a POST [power on self test] screen. If you do not see the POST screen, you may have damaged your BIOS. Depending upon the age, make and model of your motherboard, you may be able to flash your BIOS your repair damage. If not you may have to buy and install a new BIOS chip, again this depends upon your mother age, make and model. Some BIOS chips are soldered in place.
by gkheart1
Hi,
I have had this problem myself. Mainly with
compaq machines. If the machine worked fine
untill you moved the jumper it is possible that
the cmos chip has locked up. Sometimes it will
get it unlocked if you move the jumper from
the clear position to the normal position back
and forth quickly about 20 times. You may have
to repeat this process more then onece. I know
it sounds weird but it sometimes works. It seems
that a very small amount of voltage gets traped
on the mainboard somehow and it holds a semi
conductor switch closed and won't allow it to
open, Moving the jumper in this fashion will
sometimes release this current. Also you may
try removing the battery and unplug the machine
from the wall for at least a couple of days,
But I like the jumper trick myself because of
the instant results. This may work for you,
Unless static discharge was a factor in it's
failure, Or if you had the machine running!
Usually when the bios is locked up the machine
will do nothing. No picture at all on the
monitor, No Leds will light on the drives,
The only leds you will see are the power led,
And maybe the HDD led or maybe not. Give the
jumper trick a try. I've seen it work several
times. Regards, Gil
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