HP Pavilion G7-1135sd bios update went wrong

[pecrie]

Ok, so I have this laptop and the leds on the caps lock and num lock button keeps flashing 2 times on power on.
So it means a problem with the bios.

What options do I have now ??There is no hard drive in the laptop (so no OS)

I have read that I can try to solder out the bios chip(s) and then reprogram it with the correct bios.I have the USB CH341A programmer and another a bit older type.

As now I think that the bios firmware is corrupted.

Any ideas ??

[pecrie]

Re: HP Pavilion G7-1135sd bios update went wrong

I must add to this that I already have tried the HP recommendation , with the Windows & B button (and then Esc if IIRC)

But that didn't work.So now it is down to use a dump Main Bios file , for this model type ?

Do I also need the EC bios (if this laptop has it ?)

Any advice ??

[caspian]

Re: HP Pavilion G7-1135sd bios update went wrong

First try resetting Bios.
Desoldering the Bios chip is the easiest way for reprogramming. Please mention the mainboard model to find an appropriate Bios dump for this mainboard. Is it the R12 mainboard?

[pecrie]

Re: HP Pavilion G7-1135sd bios update went wrong

caspian ,

Thank you for your reply.I have not dismantled the MBoard from the housing yet.
Will do that in the coming days.Then I will note the MB number/make and Rev.

If I have the Main bios chip in the programmer , how do I reset the bios then ??I will say what bios chips are on the MB.

Of course I will make a back up of the old ( maybe corrupted) bios.From the 2 bios chips if it has 2 bios chips.

[caspian]

Re: HP Pavilion G7-1135sd bios update went wrong

resetting Bios must be done before desoldering it from the mainboard.
Some mainboards have specific mechanisms to recover Bios from Bios damages. But I do not know whether this mainboard has it or not.

[pecrie]

Re: HP Pavilion G7-1135sd bios update went wrong

So is there anyone who has a bit more ideas about this ??I will take the MB out in the coming days.

But just want to know if I should order some new bios chips or if I can still use the old one.

That said , should I look for a dumped bios from this model laptop , or can I use a dumped bios from this G7 series ??
So from a 1000 - 1200 etc series ??

Like I said the HP tip with the Windows + B button did not work.

Any tips will be welcome.

[SMDFlea]

Re: HP Pavilion G7-1135sd bios update went wrong

Make a backup of your old bios first and post it here.The bios has DMI info ,make ,model,UUID that needs transfering from your bios backup to the bios from the hp website before you flash it. To flash the EC you need a special programmer. Heres some hp DMI tools: https://www.badcaps.net/forum/showthread.php?t=69204

[pecrie]

Re: HP Pavilion G7-1135sd bios update went wrong

Hi SMDFlea ,

Thank you for the information.Obviously this is/will be my first try to do something in/with the bios - reflashing or re-programming.

These programms that you have referred to me , are they just for use in/with programming the EC chip ??

Or can I use these also for the main bios chip ?

I understand that when I post the Original (probably corrupted bios firmware) here , someone can/may modify it.
With the correct information ??

And is it necessary to also re-programm the EC chip ?

[SMDFlea]

Re: HP Pavilion G7-1135sd bios update went wrong

"These programms that you have referred to me , are they just for use in/with programming the EC chip ??"

The DMI tools are used to store the laptop serial number and other info.You can also use a hex editor to copy the DMI info from the bios backup to the new bios.

"I understand that when I post the Original (probably corrupted bios firmware) here , someone can/may modify it.With the correct information ??"

Yes .

"And is it necessary to also re-programm the EC chip ?"

No ,unless its corrupt and needs programming,or its faulty/burned/corroded.

[pecrie]

Re: HP Pavilion G7-1135sd bios update went wrong

Ok , when I have the MB out and have backupped the bios chip firmware I will post here.
Thank you very much , so far.
You have been very helpful