Dell 6540 cmos battery ( no data )

[Rekoo1997]

Hi
Dell model : la-9411p
Laptop it working power only (no data ) if connect cmos battery but if remove cmos battery and turn on laptop working fine but if restart no data


I have tried flashing more bios
And cleared me but still problem
Please call help me

[mon2]

Re: Dell 6540 cmos battery ( no data )

Hi.

What is the meaning of 'no data' ?

The cmos battery is used to hold your real time clock settings, the hardware configuration like hard drive parameters, the boot priority, etc.

Is this what is lost when you remove the CMOS battery? This is normal.

[Rekoo1997]

Re: Dell 6540 cmos battery ( no data )

Hi.

What is the meaning of 'no data' ?

The cmos battery is used to hold your real time clock settings, the hardware configuration like hard drive parameters, the boot priority, etc.

Is this what is lost when you remove the CMOS battery? This is normal.

"No data " I meaning the laptop running power but no display and no response
And power supply current 1.2 amp
But if I remove cmos battery all things working fine

[mcplslg123]

Re: Dell 6540 cmos battery ( no data )

I faced the same issue on a latitude E6420 LA-6591P. It was resolved by flashing bios though i tried atleast 7-8 dumps and fortunately one worked. So very likely its a bios issue.