HP Pavilion DV73020SA Laptop Wont Boot, how can I trouble shoot the power issues? [ Edited ]

[over2u]

Hi...  First time posting here so I hope this is in the relevant section..

I have a HP Pavilion DV7-3020SA Entertainment Notebook PC

s/n {Removed for privacy}

p/n VL110EA#ABU

Windows 7 Home Edition 64-bit Version

The laptop [2yr Old] has had only the normal HP and windows 7 updates and was working perfectly prior to its last shut down [2 days ago]. The problem is as follows :

When the power on button is pressed. All the lights flash once. Fan starts then the machine dies.

I have tried to start the laptop with/without the battery connected but the result is the same. I am aware that these machines have overheating problems & have been careful to avoid this by ensuring the laptop is always well ventilated. I have had no previous problems.

It takes about 2 sec for the shut down process to complete, without ever getting to the windows logo or offering a chance to access Bios. I believe it is a hardware issue.

I have used a multimeter to determine if the HP power adapter has failed. It appears to be working correctly at 19.5 volt. I have removed the hard drive and checked that its still viable. it appears to be working fine. I am a fairly competent user and comfortable taking the machine apart if that is required. Any help would be appreciated. Thnx

[Mumbodog]

Some advice on this page

http://h10025.www1.hp.com/ewfrf/wc/documentSubCategory?tmp_rule=60018&tmp_task=solveCategory&cc=us&d...

[over2u]

@ Mumbodog

Thanx for the reply ... checked the info from your link... but was not able to get any result that fixed the problem .. beginning to get the feeling its terminal ... or at least a waste of £500... 

[Mumbodog]

I would try another AC adapter before giving up on it.

[over2u]

@ mumbodog

Hi .. Guess your right that would be an obvious move .. Will take it to a local store an get that checked today. not expecting much of a result tho as the multimeter I used did seem to suggest the power output from the adapter was correct.. but you never know ?

[Mumbodog · Accepted solution]

Power output can drop when it is under a load like charging or when the notbook is booted up and running, or both.

[over2u]

@mumbodog

Thanks for the help ... after having the computer and the power adapter examined by a local techs it appears that it has a failure on the motherboard,,,

I am pretty sure that the diagnosis is correct & the laptop is dead & only expensive replacement of parts will bring it back to life... I am not going to invest further time or money on this machine.

I now join the ranks of disappointed HP customers & will never purchase another product from this company.. Or recommend that anyone else does...

I gave the Kudos salute to you as yours was the only reply that I recieved .. Thanks again for the time out..

[Mumbodog]

Sorry to hear it is dead.

Thanks for the Kudos.