HP Pavillion DV6-2010sv Caps Lock & Num Lock Flashing Twice (BIOS Corrupted)

I have a HP Pavillion DV6-2010sv with a strart up problem (screen is black - cannot boot).
Caps Lock and Num Lock are flashing twice and Wifi is orange.
HP says that the BIOS is corrupted.

I have tried the following without any success :
1) The solution from the article with id  28161121 which says to remove the real time clock battery for 5 minutes.
2) Update bios with a USB drive (FAT32) and pressing Window + B with file 3635F12.fd renaming to 3635.fd, 3635.bin, 3635.rom and 3635.
3) Remove power cable, remove battery, press power button for 1 minute, etc.
4) Dissasemble laptop and clean CPU fan and put new thermal paste.

CPU fan is working ok.

Note: In this laptop i have changed  the MB before 1 year.

I do not know what else to do. Any help would be very important !

Thanks.
ctriadaAsked:
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JohnnyCanuckConnect With a Mentor Commented:
HP are not being honest with you.  Your actual problem is the dreaded cold solder problem.  Basically, during manufacture of the motherboard, they did not solder the GPU correctly.  After repeated hot/cold cycles the solder cracks, breaking the connections to the GPU, which prevents the system from initializing.  There is good news, you can fix it yourself if you feel brave enough to remove the motherboard (similar to this video),

https://www.youtube.com/watch?v=_1J6kqAk_ig

or get a shop to do it for you.

https://www.youtube.com/watch?v=S2jPq8Qf6g0
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JohnBusiness Consultant (Owner)Commented:
BIOS is separate from the operating system and is needed to start the computer. Try to start the computer with a bootable CD. If it starts, the problem probably is not BIOS. If it won't start the BIOS could certainly be the reason.
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ctriadaAuthor Commented:
Dear John,
nothing happens if i start with a bootable cd. Nothing happens also with an external screen.
Thanks.
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JohnBusiness Consultant (Owner)Commented:
So then I think HP is probably correct that the BIOS is corrupted.
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dbruntonCommented:
You could try removing the memory, blowing out the memory slots and then trying the memory one piece at a time and seeing if that fixes the problem.

This is a last desperation attempt and I suspect it won't work as the memory failure is usually three flashes and not the two you are getting.
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ctriadaAuthor Commented:
I have already checked the memory slots and nothing happens.
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nobusCommented:
>>   Update bios with a USB drive (FAT32) and pressing Window + B with file 3635F12.fd renaming to 3635   <<  did it ever start copying the file? if not the bios is completely dead
in such case, the chip has to be reprogrammed with an eeprom programmer, or replaced with a programmed chip
some companies do this :BIOS   Recovery---http://www.bios-repair.co.uk/Index.html      
you may find others  http://www.bios-repair.com/

this may help also in some cases :  http://www.technibble.com/how-to-recover-from-a-bad-bios-update/
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ctriadaAuthor Commented:
>>  did it ever start copying the file? if not the bios is completely dead <<
it makes 4 beeps each one for each file, the USB lights red 4 times for each file, then the laptop shuts down and then it restarts unfortunately without success.
I will give it a try and ask bios-repair link.
Thanks
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nobusCommented:
post the results anyway
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JohnBusiness Consultant (Owner)Commented:
It may not be BIOS, but since the machine won't start or budge at all, it is surely a hardware problem in the machine.
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nobusCommented:
ive done these for several laptops myself.
not sure if it has the same symptoms - but if it's dead, you have not much to loose
if you want details on it - just say so
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ctriadaAuthor Commented:
Dear JohnnyCanuck,
can you give me more details please ?
My main difficulty is that i do not have the burning tool and also the metal plate with the hole in the middle. Is there any set for this job in e-Bay - can you send me a link ?
Also i did not understand what material was the one that he put with the toothpaste.
Finally how much reliable is this solution because my client is far away for my city.
Thanks
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JohnBusiness Consultant (Owner)Commented:
Unless you are adept at mechanical repairs, you might be as well off to get the machine serviced somewhere (local to the machine).
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ctriadaAuthor Commented:
Sorry but i am looking for serious help, not looking for conversation !
Thanks
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JohnBusiness Consultant (Owner)Commented:
Getting a professional repair is a solid suggestion, not "conversation" . I get lots of machines repaired by service professionals.

The suggestion of a cold solder joint is very feasible (had it happen to a T41 of mine), but by no means the only possibility.
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nobusCommented:
it is not sure (from the symptoms ) that that was the cause; as i already suggested
i use a heat gun  - for about 10 minutes
i cover the rest of the board with aluminium foil (from chocolate) in which i cut a hole, a big bigger that the chip's size
i even made a crude setup for its
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ctriadaAuthor Commented:
Thanks nobus, i will give it a try !
Wat was the material that he uses with toothpaste ?
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nobusCommented:
>>  Wat was the material that he uses with toothpaste ?  << i never clean my teeth during that process
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ctriadaAuthor Commented:
Is there any other video link with the procedure ?
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JohnBusiness Consultant (Owner)Commented:
Also be aware (digging into my own experience) that a cold solder joint on at GPU will not prevent the machine from starting (been there, done that). You might wish to take another try to see if the machine will grunt or beep for you.
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JohnnyCanuckCommented:
https://www.youtube.com/watch?v=tjWXExWM4RU

Not sure what you mean by toothpaste, but its probably thermal compound, which needs to be cleaned off before the repair and reapplied after the repair.  Any piece of metal with a suitably sized hole will do, or even tinfoil.  Its purpose is to protect the rest of the board from the heat.
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nobusConnect With a Mentor Commented:
there is nothing to it
-disassemble the system and the cooling system, so you have the cpu and gpu clear before you
-clean gpu and cpu of heat paste
-cover the rest of the board with alu-foil
-heat the gpu for about 10 minutes
-let it cool down for at least 20 minutes
-reasemble
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JohnnyCanuckCommented:
One more thing, once the repair is complete and you have successfully booted the machine, immediately look for a BIOS update.  Many of the machines with this problem were issued BIOS updates which changed the way the fans work in an effort to better keep them from overheating.
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nobusCommented:
ctriada - did it work?  no problems ?
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ctriadaAuthor Commented:
yes it works.
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nobusCommented:
tx for feedback -  and enjoy
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