Thanks in advance for the help.
My computer is running Windows 7 Professional. It will not boot with the cmos battery installed.
When the power is plugged in the front power button is solid amber.
When the computer starts up it gives 5 beeps.
When the cmos battery is out the computer will boot up to the screen for F2 (run setup) or F1 (default settings).
If I press F1 the computer will start up normally.
If I press F2 to enter setup I can set the date and time.
When I install a new cmos battery (with + up) the computer will not start up.
It does not seem to be the power supply, as the computer has been up for a whole day.
If I turn off the computer it will not boot until I drain the electricity from the board.
I can start it up without the cmos battery.
5 beeps is "real time clock failure" and the solution is supposed to be a new motherboard battery. Sure the replacement battery is good?
When yu replaced the battery, did you: power off, unplug and press/hold power button for ~15 sec, then remove the battery and press/hold power button again for ~30 sec, and finally install the new battery ?
You might also want to reseat all the RAM modules and PCI cards in their slots, though this may not help.
If all that fails, it might be a motherboard failure which is preventing it from detecting the battery voltage...
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Forum Member since 2004
I am NOT a Dell employee