Lenovo L540 Recovery

[Mawa1105]

Hey,
i have a Lenovo L540 with a bad Bios. First it just showed the Lenovo Logo and a Time Error. "real time clock error". And i was not able to enter the Bios.
I took a Dump with a CH341A Programmer and tried to flash an other dump from the Internet. Now the Notebook powers on immediately after plugging in the power cord. The fan rotates and the screen is black!

What can i do?


I added the dump i took before i tried to reflash the chip and the File from the Lenovo Homepage.

i hope you can help me
best regards
Mawa

[Mawa1105]

Please, i need any idea hwo i can recover the motherboard!
Could anyone tell me how to get a working bios memory?

Kind regards
Manuel

[genius239]

Hi~~
Here are two dump bios you can try ,and if you confirm it is a bios issue ,maybe you can consider to replace a new chip to test.
http://www.4file.net/cya514saf1fx/l540.rar.html

[Mawa1105]

Hey,
thank you a lot for answering!

I tried both dumps. both do not work.

If i flash the chip and plug the power cord in, the power button flashes 2 times and the fan starts to rotate. Also i can hear some silent noise from the speakers. I can turn the laptop off by long pressing the power button, but it turns itself on a short while later.
I tried to use a VGA Monitor but that does not start either.
Without a bios chip the device does not turn on at all.
If i flash 00 or FF to the entire memory, the Laptop also does not start.

I tried it with the original chip and with a new one! Same behaviour. (i soldered a adapter for my clamp to the footprint to easy plug in and unplug the chip...)

Kind regards Manuel

[genius239]

Another idea ,maybe ec is need write ,too.
Or ec chip damage??

[Mawa1105]

Where can i find the ec ? I think i can not easyly programm tis chip. Is the ec a normal microcontroller?

How can i check if the ec is faulty?

[Mawa1105]

Hey,
i bought a used Board (inclusive i5) for 30€...
is it possible to modify the whitelist?
otherwise the thread can be closed.

Thanks for your help!
Mawa

[Dudu2002]

Hey,
i bought a used Board (inclusive i5) for 30€...
is it possible to modify the whitelist?

Thanks for your help!
Mawa

Hi
yes...but need your bios dump
P.S. Your bios is rewrite protected...you need SPI-programmer+SOIC8 clip only