Battery not charging after CMOS reset because of a power failure on battery

minlitee said:

Hi there.



I have Mountain Lion on my HP laptop with sleep working (with open/close LID also) . My laptop is on AC + Battery Everyday but at nights ( The battery is 100% ) I close the lid and it goes to sleep and I unplug the AC and let it be on battery for the whole night ( At mornings I get 80% battery which is so far so good ).

However last night I did the same but in the middle of the night the battery had compromised the plan and failed so the laptop ( I guess, because I wasn't awake ) died being on sleep mode.

This morning when i opened the lid expecting it to welcome me warmly I saw it is turned off so I knew something was wrong.

When I tried to turn it on it didn't on battery ( No reaction to the power button ) but It turned on on AC but it didn't even display the HP logo at the very first and so It was broke. I assumed it was the LCD dying but it wasn't. After so many ways ( Hard-reset using power key, trying to boot into OS blindly, ... ) I finally solved it by opening the laptop and forcing a CMOS Reset by removing my BIOS battery and RAMs. So It turned on this time and displayed me a message saying that the CMOS checksum is invalid and so we need to reset the CMOS I preesed OK and it restarted and everything was working fine again however I noticed that I have a problem with my battery. On Windows it says 0% plugged in, charging.. but it won't charge. for 2/3 hours the battery level is the same 0%.

I tried flashing the bios again but it didn't help.



Any ideas about this?

Click to expand...

minlitee said:

I guess it's not the battery. Because I replaced the battery two months ago and it's not supposed to be dead in two months. It should work for at least 1 year or two. So I will prefer to first try other ways.
I guess something that is glue-ing the battery and the OS is broke. something like BIOS or something I don't know about.

Click to expand...

RehabMan said:

The OS doesn't control battery charging. It just reports what the BIOS (actually DSDT) reports... In Windows and OS X. Most laptops have an "embedded controller" (EC) responsible for controlling/reporting battery charge.

I think that if your battery doesn't charge and the computer doesn't respond to the power button when running only on battery, then your battery is toast.

Like I said, letting the system run only on battery each and every night is not a good idea. It just places stress on the battery leading to early degradation of the battery.

Good luck...

Click to expand...

minlitee said:

I've done a HP Battery Check today but it reports that everything is OK. And the battery works well?!

View attachment 56752

PS: Sorry for insisting too much on my thoughts , but it's something I feel thats not the battery. ( Working 3 or more years in Embedded Board designing for robots and embedded programming I can feel what those machines try to tell me )

Click to expand...

RehabMan said:

Hmmm... Maybe I misunderstood your previous post where you said the batter wasn't able to build a charge while running Windows!?

If your battery is working, then what is your issue??

Click to expand...

minlitee said:

I edited my last post. Please take a look on more specific info.

No It won't charge the battery. It stays on 0% I meant the software says it works well but basically it doesn't as I see.

Click to expand...

minlitee said:

I did it already but it didn't help.

When I first put it my AC when battery is on the charge light blinks 12 times. I guess it must be a message or something..

Click to expand...