Whats broken on my laptop? the charger, battery or something else?

Your best bet is to take your computer to Best Buy and talk to Geek Squad. The problem is most likely the charger or the plug in your computer where you put the charger. Somebody who used your computer before probably messed up the plug where you put in your charger. But still, you need a professional assessment and will have to pay some money to get it fixed.

this happened with my compaq presario CQ150 it has something to do with a plug connecting the display to the processors. it didnt really make sense to me because what does that have to do with the batteries? haha anyways i sent it into them because i was still covered my the warranty and they fixed it. if ur still under warranty i would send it. if not you could still send it but you will have to pay shipping and handling and you will have to pay for what ever parts they will be replacing. help me? http://answers.yahoo.com/question/index;_ylt=An8Egvr4FTlhPmLGpxkhKZPsy6IX;_ylv=3?qid=20100101232910AA9Y1bc

Its Either The Connection in the charger is loose OR where you plug it into is not working Hope it helps, Teenage Genius

It's not supposed to be blinking at all. it's something that could be wrong with the battery, charger, the computer. We have almost the same computer. have it checked out A.S.A.P. Good Luck. I'm here is you have any more questions.

I'm not a doctor but.. There are 3 wires (inside that big black one) coming out of the coil box (that black box that connects to the wire that connects to the plugs that connects to the socket) and in between ... Via wiggling power cord.. wires get disconnected. And more than likely, the way you're describing it here, it's the hot wire. You have a few options.. 1: Pay $50 for a new wire.. 2: Or slice, solder, and apply heat shrinking tube. edit: If you're going to solder, make sure you keep the wires isolated thereafter*

It will be the charger.

so i am assuming that what you are trying to say is that the laptop only lasts for only 10 mins when you unplug the charger? If so, you will need a new battery. get one from here: http://www.google.co.uk/products?hl=en&q=presario+a900+battery&sourceid=navclient-ff&rlz=1B3GGLL_en-GBGB359GB359&um=1&ie=UTF-8&ei=F5g_S4HFINrLjAeMwKmtDQ&sa=X&oi=product_result_group&ct=title&resnum=1&ved=0CB4QrQQwAA (UK) or here if you live in US http://www.google.com/products?hl=en&q=presario+a900+battery&sourceid=navclient-ff&rlz=1B3GGLL_en-GBGB359GB359&um=1&ie=UTF-8&ei=F5g_S4HFINrLjAeMwKmtDQ&sa=X&oi=product_result_group&ct=title&resnum=1&ved=0CB4QrQQwAA But I would always reccomend that you take it to a professional, it could be a device malfunctioning, and using more of the battery than needed - if so, your new one might not work as well, so try to take it to a professional, or you can take my risky route as displayed above!

It is a compaq witch cost a lot of money four to replacement parts. Just buy a new computer.