Weird Issue Lenovo U410 DA0LZ8MB8E0 REV E.

[aguapanela]

Dear experts ,

Any advice would be appreciated I am getting this weird behaviour on this motherboard from Lenovo laptop U410 DA0LZ8MB8E0 REV E.

Lenovo logo shows up then no image at all but board seems to keep it self on but no image.

I have tried every possible bios bin files for both main bios and EC with no luck.

When I leave it off for one day the next day it boots up I can get into bios menu but if I switch on and off a couple of times I get the same scenario Lenovo logo then nothing

I am not quite sure if VCC's voltages are ok since schematic is not very clear about this.

[caspian]

Re: Weird Issue Lenovo U410 DA0LZ8MB8E0 REV E.

Is backlight on after the Logo when the screen gets blank?
The next time you get access to the Bios page, look for an option called "Fast Boot" or "Startup Logo". If there is such an option, make it disabled. Then, restart the laptop and look at the messages on the screen (if any).

[aguapanela]

Re: Weird Issue Lenovo U410 DA0LZ8MB8E0 REV E.

Hi Caspian, thanks for answering
Backlight stays on after logo disappears, and I will try disable fast boot and or boot logo if found when I have the chance

[piernov]

Re: Weird Issue Lenovo U410 DA0LZ8MB8E0 REV E.

Confirmed it's not an HDD/ODD problem?

[mcplslg123]

Re: Weird Issue Lenovo U410 DA0LZ8MB8E0 REV E.

You can also try by removing sound/lan/card reader chips and then see if it makes any difference.

[aguapanela]

Re: Weird Issue Lenovo U410 DA0LZ8MB8E0 REV E.

Confirmed it's not an HDD/ODD problem?

Yes, confirmed I removed HDD and its additional SSD.

[aguapanela]

Re: Weird Issue Lenovo U410 DA0LZ8MB8E0 REV E.

You can also try by removing sound/lan/card reader chips and then see if it makes any difference.

Yes I already did that, thanks for answering

[caspian]

Re: Weird Issue Lenovo U410 DA0LZ8MB8E0 REV E.

was this laptop liquid-damaged or dropped?

[aguapanela]

Re: Weird Issue Lenovo U410 DA0LZ8MB8E0 REV E.

was this laptop liquid-damaged or dropped?

You are right caspian liquid-damaged

[caspian]

Re: Weird Issue Lenovo U410 DA0LZ8MB8E0 REV E.

So probably the liquid has damaged a pin of an IC or a ball of the PCH/CPU. Then, you see such a weird behavior.

[aguapanela]

Re: Weird Issue Lenovo U410 DA0LZ8MB8E0 REV E.

You are probably right caspian Ic's are all fine from what I could check but regarding PCH/CPU is it repairable?

[caspian]

Re: Weird Issue Lenovo U410 DA0LZ8MB8E0 REV E.

Does any IC have a dark pin? If so, reflow the IC.

Did the liquid approach PCH/CPU location? If so, you can assume a PCH/CPU ball got corroded. Then, try to clean the mainboard using an ultrasonic cleaner. It may resolve the issue. If it did not, a reflowing or reballing may be required.