HP 6735s ok power but nothing on screen

[rippergr]

Hello all,
I have a 6735s HP which powers on but there is no image on screen. Caps lock flashes 5 times.
I searched in forums and they said to reflow gpu and northbridge. I did that but nothing changed.
Can someone guide me what to measure to see if it's northbridge or GPU (or something else)
Thanks.

[dj_ricoh]

Re: HP 6735s ok power but nothing on screen

Change bios battery if its AMD and test mant memorys

[ktmmotocross]

Re: HP 6735s ok power but nothing on screen

give NB heat to 100c and check for screen.

[claudyu07]

Re: HP 6735s ok power but nothing on screen

hook it up to external aswell

[rippergr]

Re: HP 6735s ok power but nothing on screen

I changed cmos battery and change memory.
I reflowed GPU and already checked it in external monitor.
Nothing changed.
The caps lock still flashes 5 times

[ktmmotocross]

Re: HP 6735s ok power but nothing on screen

give NB heat to 100c and check for screen.

[rippergr]

Re: HP 6735s ok power but nothing on screen

you mean put it in oven or put in preheat in 100c ?

[ktmmotocross]

Re: HP 6735s ok power but nothing on screen

just heat NB to 100c with preheater, put al foil under the board to heat only NB not GPU

[Djosla]

Re: HP 6735s ok power but nothing on screen

6735s has nb and gpu in same chipset...