Notebook TERRA MOBILE 1541H

[antppe]

Hi all members, I'm Antonio and I write my first post from Italy. I will explain my problem: I have a notebbok TERRA MOBILE 1541H with cpu i7 4712mq with motherboard Clevo 6-71-W2W50-D02 which, when switched on,black screen. has start LED on, working CD-DVD, hard disk that can be heard spinning, fan stopped and CPU which naturally heats up. So what's the problem? Corrupted bios or burnt motherboard?

[Sephir0th]

Re: Notebook TERRA MOBILE 1541H

Open the Laptop, visual inspection, Voltage at all coils present? If yes, I'd indeed start with BIOS Firmware.

[antppe]

Re: Notebook TERRA MOBILE 1541H

Ok. Thanks for the reply. As soon as I have free time check.

[speggio91]

Re: Notebook TERRA MOBILE 1541H

I don't know if it may be useful, but i attach the service manual of a similar models.

[antppe]

Re: Notebook TERRA MOBILE 1541H

This is photo motherboard . On the two chips near the PCH there are just a few numbers and that's it.

[speggio91]

Re: Notebook TERRA MOBILE 1541H

This is photo motherboard . On the two chips near the PCH there are just a few numbers and that's it.

check these two chips, there should be the name of them on the pcb.
If they correspond to U15 and U16 then they are Main bios and EC.
Even if the name doesn't mach the schematics, try to check with a microscope or a magnifier the code over the top so you can identify what is it.

[antppe]

Re: Notebook TERRA MOBILE 1541H

The abbreviation on the one highlighted is 2940S - A
423QB
the other has the initials 20N03
3M01

[antppe]

Re: Notebook TERRA MOBILE 1541H

https://www.alldatasheet.com/datashe.../EN25QH64.html

https://www.alldatasheet.com/datashe.../EN25QH32.html

[SMDFlea]

Re: Notebook TERRA MOBILE 1541H

The abbreviation on the one highlighted is 2940S - A
423QB
the other has the initials 20N03
3M01

Those aren`t U15 and U16 ,the 20N03 is a mosfet.Look for U15 and U16 in white silkscreen

[antppe]

Re: Notebook TERRA MOBILE 1541H

I found these on the EN25QH32 manual
EN25QH64

[antppe]

Re: Notebook TERRA MOBILE 1541H

only these two are 8-pin

[antppe]

Re: Notebook TERRA MOBILE 1541H

only these two are 8 pin

[SMDFlea]

Re: Notebook TERRA MOBILE 1541H

The abbreviation on the one highlighted is 2940S - A
423QB
the other has the initials 20N03
3M01

Post good clear readable pictures of both chips ,and the silkscrren around them

[antppe]

Re: Notebook TERRA MOBILE 1541H

Here are the pictures you asked for

[SMDFlea]

Re: Notebook TERRA MOBILE 1541H

Here are the pictures you asked for

pictures of the chips on the motherboard

[antppe]

Re: Notebook TERRA MOBILE 1541H

This is pictures of the chips on the motherboard

[antppe]

Re: Notebook TERRA MOBILE 1541H

With the phone they do not come well, this is the same as the card that is in my possession

[antppe]

Re: Notebook TERRA MOBILE 1541H

I think these are better

[antppe]

Re: Notebook TERRA MOBILE 1541H

These in the photo are the only 8-pin chips that could contain the bios

[SMDFlea]

Re: Notebook TERRA MOBILE 1541H

I think these are better

The third picture,those are the bios chips.Gigadevice 25B32 and 25B64