Lenovo ideapad 5 14alc05

[treader]

Re: Lenovo ideapad 5 14alc05

many thanks
now have charge and power on but ram is not getting switched on stuck at .4v
ill look at that next

i have shared the schematic and boardview for this model
here
https://www.badcaps.net/forum/showth...light=la-j701p

hope it can help anybody who needs it

[dimis7]

Re: Lenovo ideapad 5 14alc05

Hi all,

Can someone help me fix my bios?
Not sure if the bios is the problem but is the easiest to check.
Symptom is black screen with backlight on

ideapad 5 14ALC05
s/n: MP1ZTWVD
MO: MPNXB14130AD
MTM: 82LM005CGM
main board FLMA0 LA-J701P REV 2.0

Thank you.

[peste]

Re: Lenovo ideapad 5 14alc05

Hi all,

Can someone help me fix my bios?
Not sure if the bios is the problem but is the easiest to check.
Symptom is black screen with backlight on

ideapad 5 14ALC05
s/n: MP1ZTWVD
MO: MPNXB14130AD
MTM: 82LM005CGM
main board FLMA0 LA-J701P REV 2.0

Thank you.

ret post#11..
https://www.badcaps.net/forum/showth...hlight=15ALC05

[dimis7]

Re: Lenovo ideapad 5 14alc05

ret post#11..
https://www.badcaps.net/forum/showth...hlight=15ALC05

Thanks.

Mine is 14ALC05 not 15ALC05. Same motherboard?

Also this file and all files on this thread are very different from my backup.

Are these files suitable for flashing directly to the chip by using external programmer or are only used for software flash?

[peste]

Re: Lenovo ideapad 5 14alc05

Thanks.

Mine is 14ALC05 not 15ALC05. Same motherboard?

Also this file and all files on this thread are very different from my backup.

Are these files suitable for flashing directly to the chip by using external programmer or are only used for software flash?

Bios extracted from Lenovo site update for
Ideapad 5-14ALC05 Laptop - Type 82LM
write the content directly to the chip...

[dimis7]

Re: Lenovo ideapad 5 14alc05

Bios extracted from Lenovo site update for
Ideapad 5-14ALC05 Laptop - Type 82LM
write the content directly to the chip...

Thank you.

I will give it a try later today.

[dimis7]

Re: Lenovo ideapad 5 14alc05

Didn't work.

Laptop has a hardware issue.

+5VALWP rail is missing...

[Frostya]

Re: Lenovo ideapad 5 14alc05

Hello!
Asking for help!
Ideapad 5-14ALC05 Laptop AMD
Type: 82LM00A6RK
Board: FLMA0 LA-JP01P rev: 2.0
Serial: MP20KT17
No screen after BIOS upgrade.
BIOS: winbond 74M12JWSIQ
Try to read it by several types of programms by CH341A programmer, and they all gave different result.
1. How to read 74M12JWSIQ correct?
2. Please, take look to my already readed files.
Thank you!

[peste]

Re: Lenovo ideapad 5 14alc05

Hello!
Asking for help!
Ideapad 5-14ALC05 Laptop AMD
Type: 82LM00A6RK
Board: FLMA0 LA-JP01P rev: 2.0
Serial: MP20KT17
No screen after BIOS upgrade.
BIOS: winbond 74M12JWSIQ
Try to read it by several types of programms by CH341A programmer, and they all gave different result.
1. How to read 74M12JWSIQ correct?
2. Please, take look to my already readed files.
Thank you!

it's not good, you must have the same result.. remove the bios chip from the board before reading or writing, if you don't have anything to remove the chip, stick wires between the programmer and the chip.. watch a video here.. use one of these programs..
https://www.badcaps.net/forum/showpo...6&postcount=10
https://www.badcaps.net/forum/showpo...04&postcount=7

https://www.youtube.com/watch?v=DWWigscuQDY

[Frostya]

Re: Lenovo ideapad 5 14alc05

Sorry, guys.
Board has short circuit in 1,8 power line.
It's not a bios.
One of the indutor became too hot. It has strange voltage: 0,846 from one side and 0,766 from other.
Heat pipes hot too.

[dimis7]

Re: Lenovo ideapad 5 14alc05

Sorry, guys.
Board has short circuit in 1,8 power line.
It's not a bios.
One of the indutor became too hot. It has strange voltage: 0,846 from one side and 0,766 from other.
Heat pipes hot too.

Your BIOS chip is probably 1.8v device.
Did you use an adaptor to read it?
Like this one.


If not maybe you burn it with CH341A programmer... Or even worse you burn something else in the same rail...

BTW i fixed mine. It was a shorted cap + shorted audio codec chip.
The BIOS in post #22 is working.

[Frostya]

Re: Lenovo ideapad 5 14alc05

Yes my chip is 1,8v device, and i have the adapter for it.
The indutor was hot before i have tried to read the BIOS. So i'm sure, that it was broken before me.
Last two night before dead, lenovo drain all battery till night. Short circuit progressed to total.

[dimis7]

Re: Lenovo ideapad 5 14alc05

Sorry, guys.
Board has short circuit in 1,8 power line.
It's not a bios.
One of the indutor became too hot. It has strange voltage: 0,846 from one side and 0,766 from other.
Heat pipes hot too.

Yes my chip is 1,8v device, and i have the adapter for it.
The indutor was hot before i have tried to read the BIOS. So i'm sure, that it was broken before me.
Last two night before dead, lenovo drain all battery till night. Short circuit progressed to total.

According to service manual (link here) the PL602 is on 0.75V ALWP rail and not on 1.8V rail, so your problem in not there...

[Frostya]

Re: Lenovo ideapad 5 14alc05

According to service manual (link here) the PL602 is on 0.75V ALWP rail and not on 1.8V rail, so your problem in not there...

Thank you for advice.
Will look at the board more carefully.
Power pin of bios has only 0.028 of 1.8, and look like almost shorted to the ground.
Wiil try to find power supply for 1.8 at board to check it health.
Thank again for manual!

[giorgiodi]

Re: Lenovo ideapad 5 14alc05

Good morning guys, I have this Lenovo ideapad flex 5 14alc05 laptop, the problem seems to be the bios, I would like to reprogram it, this could be fine

https://www.amazon.it/TECNOIOT-CH341...zcF9hdGY&psc=1

in the bios I attach the photo it says
winbond
74m12jws10
2115,

this is it okay? There it says 24 25 Series EEPROM Flash can you give me some clarification?

[peste]

Re: Lenovo ideapad 5 14alc05

Good morning guys, I have this Lenovo ideapad flex 5 14alc05 laptop, the problem seems to be the bios, I would like to reprogram it, this could be fine

https://www.amazon.it/TECNOIOT-CH341...zcF9hdGY&psc=1

in the bios I attach the photo it says
winbond
74m12jws10
2115,

this is it okay? There it says 24 25 Series EEPROM Flash can you give me some clarification?

look at the board (on both sides).. do you have another bios chip??

[giorgiodi]

Re: Lenovo ideapad 5 14alc05

look at the board (on both sides).. do you have another bios chip??

Hi, I completely disassembled the mobo, there is nothing behind it, just this as a bios chip

[dimis7]

Re: Lenovo ideapad 5 14alc05

Good morning guys, I have this Lenovo ideapad flex 5 14alc05 laptop, the problem seems to be the bios, I would like to reprogram it, this could be fine

https://www.amazon.it/TECNOIOT-CH341...zcF9hdGY&psc=1

in the bios I attach the photo it says
winbond
74m12jws10
2115,

this is it okay? There it says 24 25 Series EEPROM Flash can you give me some clarification?

Hi! This programmer should be compatible with your BIOS chip but you also need the 1.8v adapter / converter or you risking damaging your chip!

https://www.amazon.it/GeKLok-CH341A-...27&sr=1-3&th=1

From the service manual the chip is the same as Winbond W25Q128 and software for this programmer is compatible with this chip.

I read / write mine in circuit using the SOIC8 / SOP8 clip.