Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

[angel-boy]

Need Schematic LMQ-1 12298-2 48.4LY26.021
thanks

[by_mex]

Re: Need Schematic LMQ-1 12298-2 - X1 Carbon

Need Schematic LMQ-1 12298-2 48.4LY26.021
thanks

[inflex]

Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

Looking for boardview/schematic for the X1 12298-2.

Currently is trying to boot, keyboard lights up for a second or two, touch-bar is active and responding, completely black screen, no energizing.

Fan will spin up for about 3 seconds, then stop for another 15~20 before spinning up again indefinitely.

[khaahk]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

Check if cpu responds to heating. Schematics i have not seen. Try another bios if no response to heating.

[inflex]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

I made a copy of the BIOS (16M) compared it to another one, a reasonable level of similarities, so I have my doubts the BIOS is at fault explicitly; though it might be the data line pullups, clock gen issue, or bad cap not getting voltage up high enough on one of the rails, all could respond to heating.

[piernov]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

BIOS corruption can happen on one bit and be sufficient for the computer not to boot. Also sometimes an external programmer will read the chip properly, but while booting the computer cannot. You should still try to flash it. Some "bad" EEPROM may work under specific thermal condition.

Also check if you have PLT_RST# on the mini PCIe port. (or M.2, dunno what's in there)

[khaahk]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

This bios is from working machine, windows serial nr removed.
CPU heating i meant that these mainboards might respond to heat like AMD chips. Worth to try before trying to waste time on deep diagnostics.

MOD EDIT: Bios Moved to new thread - https://www.badcaps.net/forum/showthread.php?p=1054064

[inflex]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

I'll give it a try later. If that one does work, what's the offset to set the Windows serial?

[inflex]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

This bios is from working machine, windows serial nr removed.
CPU heating i meant that these mainboards might respond to heat like AMD chips. Worth to try before trying to waste time on deep diagnostics.

Just noticed, your chip is the MX25L12805, mine is the 12873E, I imagine that's not going to matter, but thought I'd make note of it.

[khaahk]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

I'll give it a try later. If that one does work, what's the offset to set the Windows serial?

EEF175h

[inflex]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

Tried the new bios, no change.

[khaahk]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

If you find similar schematic with the same EC then maybe attach a post card to LPC and check if it gives some information. Memory and cpu are next in line for suscpects. Neither are good if i remember correctly this mainboard has nasty underfill under both. How much amperage is drawn?

[Jehmin]

Re: Need Schematic LMQ-1 12298-2 - X1 Carbon

Anyone Find these?

[Jehmin]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

Same problem Turning on Fan spin for a few seconds and shutting off and repeating the same steps.

Anyone find the Schematics?
Also can a capacitor have 2 different voltages?
Or is this part even a capacitor? Looks like a ceramic cap to me.

When tested with multi-meter
It may not have a side going to ground and some of these get 2 different voltages on each side. Especially bottom left.

Voltage: Tested with power plugged into board. One side lead on ground other on each each side of suspected caps.

The Ceramic caps in question are coming from the ThinkEngine Chip
I think 3 of them did not have a side going to ground. The labeled boxes are not the exact caps. The photos is not of the exact board in question and photo found online.

[Jehmin]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

...

Same problem Turning on Fan spin for a few seconds and shutting off and repeating the same steps.

Anyone find the Schematics?
Also can a capacitor have 2 different voltages?
Or is this part even a capacitor? Looks like a ceramic cap to me.

When tested with multi-meter
It may not have a side going to ground and some of these get 2 different voltages on each side. Especially bottom left.

Voltage: Tested with power plugged into board. One side lead on ground other on each each side of suspected caps.

The Ceramic caps in question are coming from the ThinkEngine Chip
I think 3 of them did not have a side going to ground. The labeled boxes are not the exact caps. The photos is not of the exact board in question and photo found online.

[Pferd5]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

I have bought an non-working X1 which had fan spin but no screen. I tried to reflow the RAM like Rossemann does (with the light touch) but ended up just heating them without the movement or slightly touch.

NOW! IT WORKS!
First real notebook repair!!!
Rossmann is right, what an adrenalin rush! DAMN does this feel good!

[Enko]

Re: Lenovo Carbon X1 12298-2 LMQ-1 48.4LY06 Boardview/Schem?

Looking for boardview/schematic for the X1 12298-2.

Currently is trying to boot, keyboard lights up for a second or two, touch-bar is active and responding, completely black screen, no energizing.

Fan will spin up for about 3 seconds, then stop for another 15~20 before spinning up again indefinitely.

Did you manage to fix it? Mine spins for a few seconds, then stops, then tries again and stops again for good.

[pratyush]

Thinkpad Carbon X1, LMQ-1 MB 12298-2

Need schematic...

[pratyush]

Re: Thinkpad Carbon X1, LMQ-1 MB 12298-2

If this one is unavailable then provide me any other related schematic diagram...

[sparrow2719]

Re: Thinkpad Carbon X1, LMQ-1 MB 12298-2

If this one is unavailable then provide me any other related schematic diagram...

I do have LGS-1 X1 Carbon schematic and boardview if you want it.