Won't Boot

BIOS BLOOPER

This is where I’m at....

When I shutdown this PC the only way I can get it up again is to remove----wait----replace the battery. This will load XP but not open.
If I go into the BIOS setup and place current date and time and fully default all settings it will
then open XP to reveal all programs and permit usage.
If left on it will automatically go into sleep mode from which it can be woken and used normally.

Everything is functioning normally NOW with the exception of the ridiculously necessity to
remove----wait----replace the battery and enter and change the BIOS setup before it will load and
fully function.

What in the world is happening

roy66

 

Dead PC Wont Boot

Does the machine have onboard video or a card i have seen Pcs not boot because of dead video card. Also pull cards one at a time except video and try to boot after each pull if no success unplug drives one at a time and try to boot still no boot borrow a different video card and try. also you may not have a power good signal from the powersupply to the motherboard or the powersupply may not have correct voltages to boot the motherboard.

 

Hi Roy66,
I have had similar problems in the past. Can you tell me what your mobo is? These problems make me think of the ECS K7S5A!
I would recommend a visit to

http:\\www.ocworkbench.com

All known mobos have their own forums there, and a wealth of info.

Roger

 

Hi Roy,

I tried to respond to your other thread about booting. I am sure that you have a mobo problem, and once again recommend a visit to http://www.ocworkbench.com and the Asus forum. All the answers, (or most of them!) can be found there.

Roger

 

TO ALL,

This is what I have been able to establish without a doubt.
The boot procedure is somehow linked to the flat circular 3volt battery.
Today I used the Start/Turn Off function to shut down the computer. It wouldn't power up again.
I removed the flat circular 3volt battery and when I came home some 4 hours later I replaced the battery and attempted to boot...........NOTHING...no power.
I checked the current flow of the power supply to the MOB...OK.
I then checked the voltage of the flat circular 3volt battery and it came in just under 3volt.
I pulled another flat circular 3volt battery from my drawer and checked its voltage...just on 3 volts. I inserted that battery and WHAMO power.
It booted up but and took me to Welcome but wouldn't take me beyond that.
I rebooted and got in to the BIOS setup and defaulted everything and the PC and all its programs are now operable.

With regards to the battery
(This is just what happened as I mentioned in a few postings back. But at that time the battery I inserted was new and had a reading of 3.36v.) so that battery in that short time has dropped from 3.36v to 2.99v.and is apparently adversely affecting bootup, hence its replacement with.......the original battery that has just come in again at 3v. after being in the drawer for a day or so.

--------------------------------------------------------------------------------
PeteC
Back to my suggestion of switching power supplies - however arduous
--------------------------------------------------------------------------------
Pete,
I jumpered the Power which has 19 colored wires where it attaches to the MOB and it powered up OK. Then there are two other wires B/W to the MOB when I attached them to the MOB the power shutdown.
The 19 wires is P1 and the two is P6 if that means anything.

Roy66

 

My latest discovery.

It will power up without the CMOS battery.
Insert the battery...won't power up.
Remove the battery..power up.
Insert the battery..won't power up and so it goes.

roy66

 

Roy66,
It seems obvious that you havea mobo problem. Put the question on the Asus forum at www.ocworkshop.com. There is no other way to solve a cmos problem.

Roger

 

This topic is probably wearing a little thin by now but I reckon for the benefit of ALL... 'cause there's a lot of lookers out there..that if we can get to the bootom of this it might be a great lesson for all.

Additional information....
I have just noticed that the fan in the PSU is not operating but as soon as I remove the P6 wires from their connection on the MOB the fan operates.
I then jumpered across those two wires whilst they were detached from the MOB and the fan shutdown when I unjumpered those two wires the fan started again.
As the PC won't shutdown from the on/off switch......only by pulling the power or by the start/shutdown procedure just wondering if the P6 is linked to the on/off switch at all.
Seems that when the PC is operating with all connections in place that the PSU fan is not running which of course would also produce a heat problem.
It would seem that the B/W P6 two wire connection has something to do with this malfunction.

roy66

 

Does this make sense.

There is a reverse biasing diode that keeps the battery from trying to hold up the rest of the system when the power goes away, but allows the power supply to hold up the memory without using the battery when power is on. It's likely that's shorted, or very nearly so. It's unlikely it's repairable, but you might ask around the local PC shops if they have schematics, and are familiar with that board, and whether or not they want to try replacing it. Chances are, it's a SMD (Surface Mount Device), and those can't be changed out like you used to be able to. Nowadays, when a board goes toes up, you just replace the whole board.