Well, first, the AC charger quit working so I paid 90 bucks for a new one, that worked fine for a couple of days, now, I can't boot up, NO VIDEO!! intermittently, it has booted to a blue screen, and mentioned a memory dump? whats going on? is it DEAD???
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If the batteries truly are new, it could be since the charger was defective it wasn't charging the batteries properly. You can buy a three stage charger designed for gel batteries for around $30 bucks on Amazon. If it is the batteries I am afraid they are quite a bit more for replacement than the charger itself. Good Luck!
First, ensure the charger is delivering voltage using a volt meter. If it is, the battery is probably bad. If you have soldering skills, the light can probably be disassembled and a replacement battery can be purchased from Radio Shack or online.
This seems like a poor soldering job at the factory which has become loose/disconnected over time, affecting the power port the ac adapter plugs into. Take the laptop to the shop and have your power jack inspected.
Try attaching an external monitor to the laptop & see if you could get any display on it. If this is successful, then you might have either a faulty LCD cable or screen inverter board. The
LCD cable transfers data signal from the motherboard & video card
to the LCD screen. It also supplies high voltage DC power to the screen
inverter board. The screen inverter board works as a power supply for
the backlight lamp mounted inside the LCD screen. It converts low
voltage DC power to high voltage AC power needed for the backlight lamp
I feel for you. HP makes a crummy product. That is why I never sell them anymore. Plus, as I do some warranty work for them, I get to see the problems up close. Their tech support usually sucks as well.
Go into Control Panel --> System --> Device Manager. Look for a Sound device or unknown multimedia device. Try updating the device to Realtek audio. Vista should have it's own Realtek audio drivers. If you can't find it, go here...