Forum RSS Feed Follow @ Twitter Follow On Facebook

Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
You have to register before you can post on our site.



Latest Threads
AMD Ryzen Motherboard Crossflashing Thre...
Last Post: sluclikocr
Today 06:02 PM
» Replies: 1
» Views: 3270
[REQUEST] Unlock Bios Lenovo Yoga Book Y...
Last Post: Cryen
Today 05:28 PM
» Replies: 1
» Views: 2112
Undervolting a Clevo P775TM1-G via the B...
Last Post: Satyre
Today 04:13 PM
» Replies: 0
» Views: 0
[Request] Adding 7th Gen CPU support to ...
Last Post: DeathBringer
Today 03:34 PM
» Replies: 3
» Views: 0
[REQUEST] Lenovo IdeaPad S145-15API (BUC...
Last Post: Dudu2002
Today 02:10 PM
» Replies: 8
» Views: 2809
[REQUEST] Lenovo B590 (H1ETxxWW) Whiteli...
Last Post: bdivrik
Today 12:25 PM
» Replies: 916
» Views: 272382
[REQUEST] Lenovo G780 (5ECNxxWW) Whiteli...
Last Post: Dudu2002
Today 11:52 AM
» Replies: 965
» Views: 274416
Bricked Lenovo E530 during BIOS update
Last Post: macinor
Today 11:08 AM
» Replies: 2
» Views: 0
Clevo P775TM1-G BIOS
Last Post: Satyre
Today 06:58 AM
» Replies: 158
» Views: 53643
[REQUEST] Lenovo Legion T5-26AMR5 BIOS U...
Last Post: francuzz84
Today 02:52 AM
» Replies: 0
» Views: 0
[REQUEST] Lenovo G580 (5ECNxxWW) Whiteli...
Last Post: Hannes
Today 12:56 AM
» Replies: 2138
» Views: 520365
Acer Aspire ZS600 (IPISB-AG Rev 1.06): U...
Last Post: dient182
Yesterday 11:35 PM
» Replies: 12
» Views: 1736
[REQUEST] Lenovo G400 (78CNxxWW) Whiteli...
Last Post: ForTheKop
Yesterday 09:38 PM
» Replies: 82
» Views: 53045
[Request] Lenovo P580 Whitelist Removal
Last Post: Dudu2002
Yesterday 05:43 PM
» Replies: 174
» Views: 39118
[REQUEST/HELP] HP Prodesk 600 G2 SFF
Last Post: inguerreroca
Yesterday 07:56 AM
» Replies: 0
» Views: 0
[READ FIRST] Access Advanced settings th...
Last Post: tohichok
01-30-2023 10:53 AM
» Replies: 422
» Views: 553673
[REQUEST] Lenovo T440(S) (GJETxxWW) Whit...
Last Post: Dudu2002
01-30-2023 06:29 AM
» Replies: 564
» Views: 144697
[Success] [Bios Mod] Dell XPS L321X EFI ...
Last Post: Maxinator500
01-30-2023 02:55 AM
» Replies: 14
» Views: 0
[REQUEST] Maingear Vector Pro 17 AMD BIO...
Last Post: razercortex
01-29-2023 09:38 PM
» Replies: 16
» Views: 1191
[REQUEST] Whitelist Removal Lenovo L440
Last Post: Dudu2002
01-29-2023 06:14 PM
» Replies: 166
» Views: 43522

Help reflashing wiped EEPROM after bad flash
I recently flashed a custom BIOS for my HP 6730B provided by Maxinator, however this BIOS bricked my laptop so now I need help restoring it.

I initially tried creating a USB recovery drive but the laptop would not initialize BIOS recovery.

Next I tried using the Win+B and Win+V commands, but neither brought up the BIOS recovery utility.

Next I decided to see what I could do with my CH341A, so I disassembled the laptop and hooked up the chip to a separate laptop. Upon reading the chip with ASProgrammer, I was able to confirm that the custom BIOS provided to me was flashed correctly.

I next tried to wipe and flash the EEPROM with the original BIOS, however it appears that the EEPROM is stuck in Write Disable Mode, so although I was able to erase the custom BIOS, I cannot reflash the original BIOS. Using "Unprotect" in ASProgrammer does not unprotect the chip. Checking the status registers for my EEPROM (SST25VF016B) confirms that WREN (Write Enable) is low (0) and writing is disabled.

According to the datasheet (attached to my post) for this EEPROM, Writing can be enabled by sending the hex code 06 to the IC, however it's not described how to send this code in the datasheet. Does anyone know how to re-enable write mode on this EEPROM? Any help is greatly appreciated!

Attached Files
.pdf   20005044C.pdf (Size: 1.06 MB / Downloads: 0)
I was able to use a different program NeoProgrammer to write to the chip correctly, however even with the original BIOS the computers will not boot.
Did you ever get it to work ?

Regards, Vaako
He throwed the PCs away.

Forum Jump:

Users browsing this thread: 1 Guest(s)