Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: the lights on the back of the battery lights up but it dont turn on my laptop can any one help me with this?Extended life [7800mah 9 Cell 11.1V] Blcak
Document: I was getting about an hour out of the old battery and this one brought it up to about 2-3 hours. Just sometimes the computer will shut off while booting up and wont turn back on until I take the battery out and put it back in. Not sure if that is the battery but since it is only once in a while (maybe once a month) I dont mind for the price point. I would definitely recommend this product.
this battery is week. it was going to replace the dell battery in my laptop but after testing it for some time it will only last 2 hours max. it has lost 37.9% of its capacity already. you get what you pay for. if you need a battery to help out a another one for the day then it will do the job. i would recommend it to someone in only that case.
The factory Dell battrery gave up after a couple years. I bought this and love the extended life of the battery. I also like how its a little bigger and tilts the back of the laptop up a little.
Great price and works great in my Dell Laptop. Ordered one for my 1737 studio as well. Seems to work the same as OEM but with extended battery life  Would buy again.
For the first day or two I was pleased with the product. It charged up fine and fit into my laptop. Then my screen started going black and in order to get it to come back on I would have to force a shut down and turn it back on again. Sometimes this didn't work. One instance, I had to try a force shut down multiple times before the screen would come back on. I will be returning the battery. Very unhappy.
I dont really notice much of an extended life compared to my original batter, maybe 30 mins, but its a fraction of the price
I bought this battery for my Dell Studio 15 . I have been using this for 3 months now the performance is satisfactory . Compared to cost of original battery , you cannot get anything better for this price . Do not expect the battery to last of 5 hours unlike other 9 cell batteries . For my laptop at balanced power mode this battery lasts for around 3 hours . The design of the battery provides good docking for the laptop.
Battery arrived on time. The battery has a nice back part that acts as  prop, which help keeps the laptop cooler. However the battery does not last as long as I thought it would have.
So I can expect much more when I dim down the monitor and turn it off when inactive.This seems to be a great battery, even better than the one supplied when the laptop was new.
Bought this for my Dell studio 1555 laptop. Fits perfect and lasts for a very long time. I have not had it run down in one use so really dont know how long it lasts. It was shipped quickly.
Answer: It could potentially be that your motherboard has failed as well. Does it work plugged in?