I have just put in a new motherboard in my acer aspire net book and the battery light is flashing and won't charge.

it sounds like one of three things:

1. Battery itself no longer functions
2. Laptop Charger has inadequate amperage
3. The motherboard is defective (most likely).

If you have another battery, or a friend with the same battery, you can try that first (and someone else's laptop charger).

If the problem is the motherboard, you can try to have it repaired but I don't trust many companies to do this kind of work. I outsource my motherboard jobs to a company called Laptop Rescue (http://www.laptoprescue.com/laptop-repair-2/). Coincidentally, they also sell laptop chargers in case that's the problem. Hopefully it's just a charger or battery issue and not a motherboard.

http://www.aurabuy.com/cheap-4400mah-battery-for-acer-travelmate-4740-4740g-4740z-4750-5335g-5335z-5340g-5542g-6495tg-8473g-8472t-tm5740-paypal.html

Remove the battery and plug in the Cord/charger, will it boot? If no, try another Cord/Charger with the EXACT same power specs. Replace battery if necessary.

how old is your laptop?

If it does not work with the Charger while the battery is out then I would say either your charger is bad, the dc power jack where the charger plugs into the laptop is bad or you've got motherboard issues. Does the charger have a light on it to indicate that it is on when plugged in the wall? Do you see any lights when you plug the charger into the laptop?

Take an ink pen and see if the little pin inside the computer where the charger plugs is loose and moves a bit. If so that is probably your problem. If the pin is tight and the charger works, then you've got motherboard issues.

Hi: Acer chargers have a very short life time, in the past 2 years I had bought 2. Just buy a new one from amazon they're very inexpensive. Here's the link: http://www.amazon.com/Laptop-Adapter-Aspire-AOA110-AOA150/dp/B0028LK6IU/ref=pd_bxgy_e_text_b

Regards,

It sounds like the battery charging ac cable might be faulty.. You might want to go to a local shop and see if they could try another cable before you go out and spend money on a new one. They usually will try a cable to see if that's the problem.. Please let me know if this washelpful and if it solved the problem and good luck..

Check the pronges inside the battery compartment. They will be like copper plated if they are not loose or broken then it may be a motherboard issue.

What I believe they were mentioning is Flash the BIOS to the most current version, which should on the Acer support site (Support.acer.com or such)
If the old battery wasn't charging and the new one doesn't either then there also may be a hardware issue with the charging circuit if the BIOS flash doesn't resolve, at which time you discuss that issue with Acer if under warranty.

What's the matter, Aspire battery for US Aspire battery for UK

connect the power supply. Check if the battery is properly installed. Then try to boot with a bootable cd