Hp pavillion dv6 stuck at HP Invent screen

Hi all,

I've had a problem with my notebook.

I've unmounted it to change the thermal paste on CPU and GPU, and now when I power it it gets stuck at the HP Invent screen for a loong time.

How can I fix it?

I've tried to change the thermal paste again, and it was ok.

I've resetted the CMOS

I've tried separately the two  RAM cards

I've tried to boot it without the hdd

BUT nothing happened..

Even the BIOS screen, when I manage to get to it, it's veery slow, I can arely navigate in it..I've resetted the Bios settings, but still nothing..

Help me pleas, I'm going crazy!

I'm afraid I might have broken the motherboard somehow..But it's difficult, I have the service manual and I've followed any step correctly, it's not my first time either..

Since I've thought that I could have mounted something in the wrond way, I unmounted and mounted it again, but still nothing..

Now I'm trying to make it boot from the Win7 DVD, but the boot menu is extremely slow..If I can make the DVD run, what should I do?Repair?

And I forgot to tell you that the first time I booted it, it worked fine and I used it for a few hours and it was going just fine!
After I restarted it, with no updates, it didn't boot anymore..

Ok, I've found the problem..It was the USB board that gave me problems, once disconnected it, it works just fine..

But due to the uncountable times I've hard resettedd the system, I'm afraid I corrupted something..Everything works, but, for example, I can't surf the web through IE, while Chrome works..

Norton just disappeared from the list of programs installed, and I can't boot it anymore..

I wanted to perform a ScanDisk, but when I restart the system, since the hard drive is in use, it says it can't access the hdd due to un unspecified error, since a software/driver has been recently installed..I've ripristinated to the oldest sytem image I had, but still nothing..

How can I check disk for errors and fix them?

Thanks!

You wanna hear something even more interesting? :D
I wasn't able to scan the disk because of Norton Internet Security: once I've used the Norton removal tool, the computer is perfect..Weird world..

I know, they cause more problems than they solve/avoid!

I once had problems with Kaspersky and Windows 7, wifi didn't work anymore until I removed it..