HP HDX Premium not turning on when plugged in

[shrtrdg]

I have an HP HDX Premium Series laptop that shut down automatically.  When charging cord was inserted and plugged into outlet the laptop would not turn on.  No lights lit except the light indicating that the cord was inserted into the slot.

Unhooked the battery and power cord then held the power button for 3-5 minutes to do a "reset".  Now the lights are lit but the screen is black (never came back up) and the Caps Lock and Num Lock lights are blinking.

Please help.  Is this a battery issue in which it needs replacing?  Motherboard problem?  Please advise.

[HaggisCat]

Try booting up with only one RAM stick in the bottom slot, if still no success, then try the other stick.

 Just from what you wrote it sounds like an automated BIOS update gone bad.

 Are you in the US or Canada, what is the full model number of your HDX, eg.   HDX18-1000ca.

 If it's a BIOS problem and you're in the US or Canada, I can get you some help.

 Also, do you still have the HP Tools partition on the hard drive, have you changed or added any of your own partitions ?

[shrtrdg]

I am in the U.S.

Regarding Model Number the only model numbering anywhere on the thing is HDX 18...even on the HP part label on the back with the serial number there should be a model numer above hte warranty information but there isn't any.

I will try your suggetions and get back regarding effectiveness.

[HaggisCat]

Don't worry about the model number, I know you're in the US and that's what's important, so it doesn't really matter.

 All the HDX18 series are all the same, but with variations to the motherboard concerning the video card and how much RAM was installed on them. (video and system RAM)

 They all had Vista on them unless the user upgraded to W7, which reminds me, what OS are you running and is it 32 or 64 bit ?

[shrtrdg]

I still have Vista installed and it is 64.

So far I have tried the following:

Removed the RAM independently and tried starting but NO success.

Got a "new" battery and tried.  NO success.

All that will still happen is that It willturn on, Caps Lock and Num Lock lights will flash, all other lights turn on, but the screen will not show anything on display.

[HaggisCat]

OK, lets try this, but it's a long shot.

 Remove the battery and adapter and do another hard reset like you did, but you don't have to hold it down for 3 to 5 minutes, one minute is long enough.

 Hold the "Windows" and "B" key at the same time > plug in the adapter (the other end should be already plugged into the wall)

 Push the power button and hold it for a few seconds while still holding the "Windows" and "B" keys.

 Release the power button and the other keys.

 The lights on the laptop should begin flash as if it's doing something and then shut down.

 After it shuts down leave it sit for 10 minutes and try booting up.

 All of this is supposed to access the last known BIOS on the HP Tools partition, assuming that it is still on the hard drive and not corrupted.

 This is also assuming that this is a BIOS problem at all.

 There is still one other thing to try with a flash drive on an HDX machine to rescue a corrupted BIOS.

 Something like this is very difficult to trouble shoot on a forum. I don't want to tell you the motherboard is toast just yet.

 Did you play games on it allot and cause it to run hot ? I am also thinking that the video card solder may have failed.