Boot problem

I am trying to fix a friends computer and I am getting a checksum error at the post screen. I have rebuilt the computer incase it was a short somewhere. I have changed the battery and checked the hardware and all seems ok. What I have noticed is that when pressing F1 i can boot into windows and everything works fine. I can even restart and it will boot into windows. The problem is that if I turn off the computer power to the case and then try to start the pc i then get the checksum error. I have also installed the latest bios. I am lost as to what it could be and am thinking along the lines that it may be a board problem or maybe the bios chip is faulty. Would appreciate any assistance or ideas as to how to remedy the problem.
Answer #1
Press delete at the boot up…Once in the Bios…Load the bios Optimum settings…save and Exit…
If it still happens…Leave the PC on for an hour or 2 for the new battery to charge…
Answer #2
Press delete at the boot up...Once in the Bios...Load the bios Optimum settings...save and Exit...
If it still happens...Leave the PC on for an hour or 2 for the new battery to charge...
Small point if the battery is the 2032 lithium ion button cell type as most are these days it is not rechargable
Answer #3
It is a 2032 battery so I guess that scuppers that idea if not rechargeable. Was getting optimistic there with s suggestion.
Answer #4
It is a 2032 battery so I guess that scuppers that idea if not rechargeable. Was getting optimistic there with s suggestion.
But the optimum settings part is still what you should use first
Question is the pc internal clock time and year changed after each boot ?
Answer #5
Have tried the optimum settings and still get the checksum error when power is turned off to the case. This is very frustrating.
Answer #6
Have tried the optimum settings and still get the checksum error when power is turned off to the case. This is very frustrating.
Of course it would..Because the bios doesn’t save…Go out and get a new battery from your nearest store..they are so cheap…
Answer #7
True i had to buy one last week
It costed me 3 euros only
Answer #8
As I stated in my original post …..I have replaced the battery with a new one
Answer #9
As I stated in my original post .....I have replaced the battery with a new one
again is the date and time reset each boot further may sound daft but is the battery right way up if so is the upper contact touching correctly check the NEW batter with a meter or led as new may not mean good lithium has a very long shelf life but not for ever
Answer #10
The date and time only need resetting when i shut off the mains power. If i just shutdown or reboot then the time and date stay good
Answer #11
The date and time only need resetting when i shut off the mains power. If i just shutdown or reboot then the time and date stay good
Then it is definitely cmos not being powered up from battery when mains is off if you are sure the battery is good and fitted correctly then its a board fault dry solder joint, open cct copper track or the likes There is a jumper link to enable the battery but I would not expect the PC to boot at all if that were on the wrong pair of pins
Answer #12
Ok so if it were to be a board fault, would i be safe to assume that he could carry on using the pc? I am pretty sure that he does not turn off the mains power when he is not using his pc…..so would it do any harm just to carry on for now??
Answer #13
It’s a battery problem…
Answer #14
I think it would do no harm just be a bloody pest after each power up it seems just that the mattery voltage is not reaching the CMOS which itself must be ok to hold its data when mains power is on
Answer #15
Thanks for your help and advice