Forum RSS Feed Follow @ Twitter Follow On Facebook

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

Username:


Password:





[-]
Latest Threads
[REQUEST + BOUNTY] Lenovo Thinkpad P14s ...
Last Post: loadit
Today 02:23 PM
» Replies: 3
» Views: 77
[REQUEST] Lenovo Yoga 2 Pro (76CNxxWW) W...
Last Post: Dudu2002
Today 10:53 AM
» Replies: 845
» Views: 317123
[REQUEST] Lenovo Thinkpad E130 (H4ETxxWW...
Last Post: Dudu2002
Today 10:51 AM
» Replies: 509
» Views: 101064
[REQUEST] Lenovo Yoga 11E (N15ETxxW) Whi...
Last Post: Dudu2002
Today 08:15 AM
» Replies: 5
» Views: 2524
[REQUEST] Lenovo G50-70 (9ACNxxWW) BIOS ...
Last Post: Dudu2002
Today 07:23 AM
» Replies: 139
» Views: 40965
[REQUEST] CPU Support for Ryzen 5 3600 o...
Last Post: flexpavillion
Today 04:32 AM
» Replies: 1
» Views: 337
Clevo P775TM1-G BIOS
Last Post: ActivatedNut
Today 01:36 AM
» Replies: 145
» Views: 55313
ASUS P5G41T-M LX2/GB Unlocked Hidden Ove...
Last Post: GangsteR23
Yesterday 04:58 PM
» Replies: 25
» Views: 64132
lenovo z570 Advanced Menu Unlocked
Last Post: Kaluva12345
Yesterday 04:58 PM
» Replies: 7
» Views: 4102
[Request] HP Elitebook 6930P WLAN Whitel...
Last Post: Maxinator500
Yesterday 02:25 PM
» Replies: 15
» Views: 6568
Lenovo ThinkCentre M715q 2nd Gen & AMD R...
Last Post: RedfieldHUN1987
Yesterday 09:23 AM
» Replies: 2
» Views: 148
L14 Gen 3 AMD , Need UEFI unlock advance...
Last Post: frankeinstein2532555
Yesterday 04:08 AM
» Replies: 0
» Views: 95
[REQUEST] Lenovo Y400 & Y500 (6BCNxxWW) ...
Last Post: freedome
03-26-2024 11:00 PM
» Replies: 188
» Views: 52216
[REQUEST] Lenovo G510 (79CNxxWW) Whiteli...
Last Post: ghostinoss
03-26-2024 09:21 PM
» Replies: 655
» Views: 167203
[Request] CPU support for Lenovo IQ57I
Last Post: DeathBringer
03-26-2024 10:02 AM
» Replies: 5
» Views: 239
unlocked Bios for Machenike s16
Last Post: Dudu2002
03-26-2024 09:06 AM
» Replies: 5
» Views: 328
[REQUEST] Bios Unlock Whitelist HP DV6-6...
Last Post: DimanTLT63
03-26-2024 03:03 AM
» Replies: 0
» Views: 145
[REQUEST] HP Pavilion G6-1252ss Whitelis...
Last Post: joseefitness
03-26-2024 01:40 AM
» Replies: 0
» Views: 126
[REQUEST] Lenovo S310 & S410 (8BCNxxWW) ...
Last Post: morgley
03-25-2024 10:43 PM
» Replies: 14
» Views: 6334
Acer Nitro ANV15-51 Bios Bin File Reques...
Last Post: Papethzkie23
03-25-2024 06:04 PM
» Replies: 0
» Views: 139

Clevo P775TM1-G AMI BIOS recovery
#1
Hello,

I'm trying to enter recovery mode on a bricked Clevo P775TM1-G.

Pressing Fn+B during POST does make it read from the USB drive but after a few seconds (USB drive with LED blinks for about 3 seconds) it just gives up and does nothing, no matter how long I leave it.

Reading from the USB drive occurs only after the keyboard lights have finished their show(seriously, whoever programmed this had a lot of time on his hands).


It does seem to recognize AMIBOOT.ROM and BIOS.ROM files because if the filename changes, then the LED on the USB drive only blinks for 1 second before giving up.

I've tried with all BIOS versions I could, olded to newest, but what I would really want is 1.05.09 as this is the last known version to work properly.

BIOS chip is MX25L6473F . BIOS is AMI Aptio if I remember correctly but BIOS files are from manufacturer so it shouldn't matter.


CH341A programmer is on its way but I was hoping to do something in the meantime.

I've attached a service manual, maybe it helps. Page 75.

I'm at the end of my knowledge. I hope someone could please help with this.

Thank you
find
quote
#2
Fixed it with the CH341A programmer. Was very easy! You can find it if you search for the chip itself. In my case, the MX25L6473F. There is only one programmer for this sold on ebay and it ships from Greece (not sure if I can post links to it, hence the details. Title is: CH341A BIOS Programmer 24x/25x 1.8V 2.5V 3.3V 5V version v1.36 + Adapters) .

Worked first time, no issues, system booted right up and I didn't even need to power the board or desolder the chip, as many have suggested.

Funny thing is: compared the information on the chip to the ROM file and they were an exact match. So it's not that the system was badly flashed or that it couldn't boot up but it was specifically designed NOT to boot up when you downgrade the BIOS. Genius!

Also found out that Clevo removed the recovery option from their version of the AMI BIOS. I speculate that they had only one reason for this: if you downgrade the BIOS, it is not covered by warranty and they will tell you (as they have told me) that the board needs to be replaced. A replacement board is 600$ without shipping. They take your old board, flash the BIOS on it and BOOM: it's back in another system or up for sale to anyone who downgrades the BIOS. All for 15minutes of work to strip down the system and flash a BIOS on it.

This is Apple level of greed. Who knew?

tl;dr: 2,000$ machine doesn't have dual-BIOS and is designed not to boot if you downgrade the BIOS even if the new BIOS will boil your GPU because the fans no longer start (V1.25).

Hope this helps someone else. My advice: don't send the board. Buy a cheap BIOS programmer, do it yourself, save a ton of money and time. Thank you for reading. Cheers!
find
quote


Forum Jump:


Users browsing this thread: 1 Guest(s)