it show's press f1 to run the setup and f2 to load default value .... how am i to press the f1 anf f2 , keyboard is not funtioning .. but the same keyboard is working with other computer's .... any idea pls...?

Hi Kumar Two things to try... 1.Replace the battery on the motherboard 2.Reset the CMOs settings Read the manual of the motherboard and see which jumper number is for the clearing of CMOS/BIOS. The jumper is usually near the battery with 3 pins (1-2-3) Move the jumper cap from "Normal Operation" which is usually "Pin 1-2" into CLEAR setting for a few seconds "Pin 2-3" Wait another minute or two, then reseat the jumper cap to normal position Good luck Krystyna To err is human, but for a complete foul-up, one requires the assistance of a computer !

i have cange the battery , i have reset the cmos , at last noting work out... is there any posible that the mainbord failure ... but the hardisk and the prosecer is running verry weell... After i reset the cmos still the same thing happen ... now the problem is ...i cannot enter into the bios it stuck at the main there... any idea's pls... Thank You..:)

Are you still getting the "checksum bad" message at bootup ? You said you cannot enter the BIOS setup becuase it is "stuck at the main there" What do you mean by stuck at the main ? To err is human, but for a complete foul-up, one requires the assistance of a computer !

Is it possible you have the KB plugged into the mouse port?

stuck mean ... it stops there .. nothing work after that ... KB pluged into the mouse port ? i have try all way .. i mean i have try pluged the KB on the mouse port and return it at the original place .... at last till now i cannot go into the bios or windows... Any idea's pls... Thank's ~!! :)

Well, just make sure it's in the KB port. Open the case and temporarily disconnect the drives and remove all the cards except video. Then see if you can get into cmos/bios setup. By disconnecting all possible hardware you can determine if it's one of those items that's causing it to hang.