04-12-2018 05:25 PM
I cannot get my X1 Carbon to boot it's baffling me. I have three motherboards I can try the same thing with. I am almost certain is has to do with the CMOS battery.
- Laptop Flashes Three Lights on Logo (Unless I unplug/replug the CMOS battery)
- If I unplug/plugin the CMOS, I can get the keyboard to light up then it shuts off.
- The fan does not spin because it does not startup.
- I used to get a 3 error beep code on one motherboard, however this had to do with the screen which I replaced and it fixed the beep.
- I get no error beep codes.
- Pressing the CMOS reset button doesn't seem to do anything (Top right, very small near hinge)
- Unplugging the CMOS battery, Putting the AC in, and Pressing power lights up the keyboard for a moment. Replugging the CMOS battery back in seems to disable everything.
- Pressing the Reset (Mid-left) usually where a pin goes.
- Flushing out static with battery/adapter removed by holding power.
- Switching the battery to ac, both, and none with everything above.
- Tried with some components unplugged, it doesn't matter -- none of them nor all of them unplugged do anything.
I have search many places and I have never had this happen, it can't be possible that I have three bad motherboards. In fact, two of them were factory tested as working. Could it be my power switch? If it was, why would I get the red flashing lights?
Does anyone have any idea what I should try?
04-15-2018 02:00 PM
When you unplugged the CMOS battery, did you also disconnect the main battery? A shorted screen can cause the symptoms. I would believe a bad screen before 3 bad motherboards.
07-11-2018 10:05 PM
Yes sir, thank you for replying. I have 2 screens also, I just don't know -- it's one plug. Everything works, even plugging the MiniDP into another screen. I used to get a very bright white glow on the back of the screen (outside of casing) When booting.
Here's an image of the input for the LCD screen:
Then, the two monitors with the same plugs: