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hp dv7 4075sf bricked
01-01-2012, 10:34 AM
Post: #1
hp dv7 4075sf bricked
hello everybody

i tried a bios mod for my hp dv7 in order to disable hybrid graphics.
Flash was ok and full menu was available. i rebooted the notebook several time and booted into windows too. No problem.

Then i went to setup and just replaced the hybrid graphics options with dedicated cpu then black screen.

I tried hundred of things read on this forum but no luck (remove cmos battery, usb flash recovery)

Please help me Undecided

Attached are my bios setup before flash...


.jpg  photo 1.JPG (Size: 436.83 KB / Downloads: 11)
.jpg  photo 2.JPG (Size: 314.77 KB / Downloads: 9)
.jpg  photo 3.JPG (Size: 345.24 KB / Downloads: 8)
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01-02-2012, 04:46 AM (This post was last modified: 01-02-2012 04:47 AM by redsectors.)
Post: #2
RE: hp dv7 4075sf bricked
i have removed the cmos battery
i have also removed hard disks to be sure that recovery will occur on usb key
i have tried different bios version from the more recent from f04 (sp48115.exe) to f29 (sp55299.exe)

Here is my files hierarchy on my usb key :

F:\Hewlett-Packard\BIOS\current\01448.bin
F:\Hewlett-Packard\BIOS\current\01448.sig
F:\Hewlett-Packard\BIOS\previous\01448.bin
F:\Hewlett-Packard\BIOS\previous\01448.sig

I tried with +b key and the all arrows keys... no luck
- I tried differents usb sticks (256m, 1gb & 4g) in fat and fat32
- i tried to put bios on root of sd cards with differents name

i guess 01448 is the right one as it is the one that is on the hp recovery partition (i unplugged the associated disk and used a sata-usb adapter on another notebook to recover the content of this partition)

i would like to know where are my bios settings stored ??! the black screen appeared when i changed the video settings from "hybrid mode" to "gpu dedicated graphics" and rebooted the computer...

my computer stay hot when i power it on as if the dedicated gpu was directly active... how can can switch back to hybrid mode ??

if you have a genious or even a silly idea... i take it ! lol
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01-02-2012, 06:42 AM
Post: #3
RE: hp dv7 4075sf bricked
http://www.bios-mods.com/forum/Thread-MU...-IMPORTANT

BIOS REPOSITORY.Please consider donating (me or forum) if you like my work.
Please remember to come back and leave feedback. I hate leech and disappear thing.

Nice day.
Camilo.
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01-02-2012, 02:27 PM
Post: #4
RE: hp dv7 4075sf bricked
(01-02-2012 06:42 AM)camiloml Wrote:  http://www.bios-mods.com/forum/Thread-MU...-IMPORTANT

I have done the recovery using the directory structure you suggest... i see usb accesses on my usbkey, fans went noisy... i waited more than half hour but no shutdown of the laptop.

f11 & f12 keys remains orange, capslock is functional (highlighted white when pressed) ^^

Still black screen....Huh
No video on external monitor neither...
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01-04-2012, 08:47 AM
Post: #5
RE: hp dv7 4075sf bricked
memory was checked on another laptop : ok

there is no beep or blink of the caps lock key about a problem.

what could it be ?

Nobody has an idea ??
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03-04-2012, 10:38 PM
Post: #6
RE: hp dv7 4075sf bricked
(01-04-2012 08:47 AM)redsectors Wrote:  memory was checked on another laptop : ok

there is no beep or blink of the caps lock key about a problem.

what could it be ?

Nobody has an idea ??

this could be a sign that your motherboard needs to be replaced or repaired- I had a similar issue with my hp labtop when it overheated- caps lack remained on, no ability to see display- had to send to hp for repair- luckily labtop was still under warranty- hopefully your warranty is still good.
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