Lenovo B50-50 Bios repair

[Conste]

Dear all,

I have an Lenovo B50-50 unit here which doesn't post. Everything seems fine, but no post.
I think it could be BIOS related.

I have tried 3 different BIOS from the web, but they didn't work, maybe because they are for ideapad 100 units?
Ideapad 100 und B50-50 share the same mainboard (NM-A681), but maybe have a different EC firmware so that B50-50 EC FW and ideapad 100 bios won't post.

I could not find any free bios for B50-50, so I upload my dump here, hope somebody can repair it.

Best regards,

Constantin

[Claudiomfa]

Re: Lenovo B50-50 Bios repair

try this file and report..

Bios and ec file

[Conste]

Re: Lenovo B50-50 Bios repair

Thanks, but still no picture over HDMI...

What else could I test? Could also be PCH or CPU failure?

[Claudiomfa]

Re: Lenovo B50-50 Bios repair

With my bios the laptop power on?

hdmi out image problem i think it's not bios problem. Do you install all manufacture software?

[Conste]

Re: Lenovo B50-50 Bios repair

Sorry, my explanation was mistakable..

Laptop powers on with ur Bios, but no screen over HDMI.
Also over eDP I don’t get a picture or backlight, so no post at all.

What could I measure?

[denzeL]

Re: Lenovo B50-50 Bios repair

try this file and report..

Bios and ec file

Model : b50-50
Motherboard number : cg410/cg510 nm-a681 rev 1.0 2015-05-26
İ/0 model : İT8586E FXA
BİOS CHİP MODEL : 25Q64FVSıQ

EC AND BİOS PLEASE...

[peste]

Re: Lenovo B50-50 Bios repair

Model : b50-50
Motherboard number : cg410/cg510 nm-a681 rev 1.0 2015-05-26
İ/0 model : İT8586E FXA
BİOS CHİP MODEL : 25Q64FVSıQ

EC AND BİOS PLEASE...

always when you make a bios request, also post the original bios, even if it is corrupted..

[O.Szilard]

Re: Lenovo B50-50 Bios repair

try this file and report..

Bios and ec file

Thank

[pixi75]

My bios has problem, Not power,all voltage is ok,include on power button.
Lenovo B50-50
Model name: 80s2
SN PF0MY49M MTM80S20002MZ
Board : cg410/cg510 nm-a681 rev 1.0

[kalilinux25]

My bios has problem, Not power,all voltage is ok,include on power button.
Lenovo B50-50
Model name: 80s2
SN PF0MY49M MTM80S20002MZ
Board : cg410/cg510 nm-a681 rev 1.0

try this one and report

[pixi75]

try this one and report

Same problem.Thank you for help.

[kalilinux25]

Same problem.Thank you for help.

try this please

[thorcito]

Hi, my bios has a problem too. I have a copy of the bios content. (CH341A)

Lenovo B50-50
Model name: 80s2
Board : cg410/cg510 nm-a681 rev 1.0

Please, somebody could help me?

I send attached the bios file.

[SMDFlea]

RULES UPDATE for BIOS requests/offers AVOID BANNING, READ BEFORE POSTING
https://www.badcaps.net/forum/troubl...before-posting

You MUST:

• Provide the full machine model number, serial number (or Service tag, SNID) and the board model number (see https://www.badcaps.net/forum/showthread.php?t=88758 ) ,The serial number, make, full model number, motherboard model and revision (except QR codes) must be written/typed at your request as per the rules. Not as a picture, part of the file name and so on.

[thorcito]

Hi, my bios has a problem too. I have a copy of the bios content. (CH341A)

Lenovo B50-50
Model name: 80s2
Board : cg410/cg510 nm-a681 rev 1.0

Please, somebody could help me?

I send attached the bios file.

I am sorry for the missing data.

LENOVO B50-50
S/N: PF0JEQ6A MTM: 80S2000JSP
Factory ID: JVHFC1
MO: PF9XB6523080

BOARD MODEL NUMBER: CG410/CG510 NM-A681 Rev: 1.0 (2015.06.26)
BİOS CHİP MODEL : 25B64CSIG

The laptop does not start. All DC voltage are ok. It has blank screen after updating.

Thanks in advance.

[peste]

I am sorry for the missing data.

LENOVO B50-50
S/N: PF0JEQ6A MTM: 80S2000JSP
Factory ID: JVHFC1
MO: PF9XB6523080

BOARD MODEL NUMBER: CG410/CG510 NM-A681 Rev: 1.0 (2015.06.26)
BİOS CHİP MODEL : 25B64CSIG

The laptop does not start. All DC voltage are ok. It has blank screen after updating.

Thanks in advance.

try..

[thorcito]

try..

It is the same problem.

Thank you for your help.

[Calgacus]

Lenovo B50-50 Bios request

Hi guys looking for bios repair bin with EC locations etc...
Model LEnovo B50-50 80S2
SN:PF0L1FXJ
BOARD:CG410/CG510 NM-A681 REV 1.0

[peste]

Lenovo B50-50 Bios request

Hi guys looking for bios repair bin with EC locations etc...
Model LEnovo B50-50 80S2
SN:PF0L1FXJ
BOARD:CG410/CG510 NM-A681 REV 1.0

try..

[Calgacus]

sorry this file didnt work, can i ask was it just a clean bios file or was it updated with this laptop DMI etc...

[apostsamking]

I have a Lenovo B50-50, which doesn't post. can anyone help repair the bios for me. thanks

[SMDFlea]

https://www.badcaps.net/forum/troubl...37#post3245237