Please Help DV7-4180US no bios post on external screen

[lungkao]

Hi, I'm new here.
I just have a question: I have DV7-4180us Laptop, the internal LCD is crack, can not see any thing. so I have to connect the external monitor to VGA port.
the problem is: the VGA exnternal monitor only working in windows mode. if I reboot the laptop, there is no BIOS post and not windows loading in external monitor.

I what try to do now is: mod the bios so it will be activated VGA during POST.
i'm using python to patch the bios, but I don't know what is:

VSS_OFFSET = ?????
VSS_SIZE = ????
PATCH_OFFSET = ????
PATCH_VALUE = ???

I attach my bios backup file, main.txt, and setup.txt
and here is link for orignal bios F23:
http://h10025.www1.hp.com/ewfrf/wc/softw...3&sw_lang=

I know This bios is RSA signed, but I know how to recovery it, don't worry

please help me, and thank you very much for your time.

[camiloml]

I tried to do it, just test and tell me

http://dl.dropbox.com/u/45117524/bios-mo...miloml.exe

[lungkao]

I tried to do it, just test and tell me

http://dl.dropbox.com/u/45117524/bios-mo...miloml.exe

it brick my laptop after I load default setting. but I already recovery the bios.
so what I have to do now for video on CRT?
I you just mod only CRT+LFP?

thank you very much for your time.

[camiloml]

hmmm, i used as base my non whitelisted bios and it has two more patches, make default CRT+LFP, and enable VT.

I can try with original, but i think result will be same.

[lungkao]

Hi Camiloml
Thank you very much for you time to try to mod the bios for me
can you try one more time only for CRT+LFP patch

also do you know what are:

VSS_OFFSET = ?????
VSS_SIZE = ????
PATCH_OFFSET = ????
PATCH_VALUE = ???

I need this value to patch CRT+LFP

[camiloml]

For using marcan's python script and patch VSS you need to work over your bios backup extracted with flashit.exe and then be able to flash it using flashit.exe

I think the flashit.exe utility will not support RSA signed bioses (maybe i'm wrong).

Only the backup extracted from your machine has your VSS table, the PATCH_OFFSET should be F6h and the PATCH_VALUE 09h for CRT-LFP. The VSS_OFFSET and SIZE you should guess looking at your bios backup.

The bios i link below has as default value that 09h i also added the patching python script repaired to work your bios backup file and patch the data you need.

The bios updater will clear your cmos to load default values and make the change active. The script is there for playing pursposes

http://dl.dropbox.com/u/45117524/bios-mo...ungkao.exe

[lungkao]

Hi camiloml
I try you new mod, this time no brick, no post on external LCD. I try load default after flash, still no post.
do you have any idea?

thank you very much for your help.

[camiloml]

Hmmm, no, if that setting has no effect... i don't know.

[lungkao]

Hi Camiloml, Thank you very much for all your help.
If you can not help me, whoelse in the world can help me?
May be I have to ask HP.

[camiloml]

Try asking at mydigitallife there are big geniuses in bios moddong too. Otherwise HP ITSELF can make the new bios rev post in both videp output ports.