Pc is several years old and was mixture and new and old parts but has always worked fine for me. It has 3gz cpu and 1 gb ram. Mobo drivers etc are up to date.
since yesterday on boot up it says 'cmos check sum error' and option is press f1 to continue. Pressing f1 boots it up ok but i have to go into date/time to set it correctly.
however, today it shutsdown and then beeps every 2 or 3 seconds. this shutdown happens randomly regardless of what you are working on. Screen comes up as 'no signal'. Only thing to do is power off at wall.
many thanks for the quick replies. yes, it was keeping good time until the first 'cmos check sum' error messages. Cmos battery - is it just a case of old one out new one in? Do i need to back anything up?
When you go into change the battery give it a good clean and get rid of any dust and fluff especially around the air vents, Psu and Cpu fans.But be careful,I usually use a hoover with a plastic extension nozzle and a fine haired paint brush.
Might be a good idea to go into the bios and make a note of all the settings, perhaps take pictures of the different screens with a mobile phone or digital camera. once you remove the battery it may reset your bios and there may be settings you will have to reset after a new battery is inserted.