I'll tell you right away, I don't understand much about electrical engineering. I have this laptop, the symptoms are as follows: when I press the power button it lights up for about 5 seconds and then goes out. The fans do not spin, there is no effect at all.
Here is what diagnostics I was able to run:
1) The motherboard sees the battery (the button lights up white if it is connected and red if it is not, as if it is almost discharged).
2) The charging LED is also on if the battery and power supply are connected (without the battery it just flashes quickly and goes out when the power supply is connected).
3) Power on USB ports, including Type-c (the phone charges with "fast charging").
4) When pressing the power button, the heatsink above the processor does not get hot
The most interesting thing is that I've had this before, a couple years ago I already changed the RAM and SSD in it, after that I had exactly the same symptoms. The laptop was without battery for a year, after that I took it apart to take pictures of the motherboard, tried to turn it on again and didn't understand how it turned on. At that point I was literally just plugging and unplugging the PSU plug. This time that trick doesn't work.
Yes, the response to the "reset" button (or whatever it's called on Lenovo?) is the same as to the power button. I also looked around, and it seems that there is no CMOS battery (not designed in principle?).
Thanks for any help
Here is what diagnostics I was able to run:
1) The motherboard sees the battery (the button lights up white if it is connected and red if it is not, as if it is almost discharged).
2) The charging LED is also on if the battery and power supply are connected (without the battery it just flashes quickly and goes out when the power supply is connected).
3) Power on USB ports, including Type-c (the phone charges with "fast charging").
4) When pressing the power button, the heatsink above the processor does not get hot
The most interesting thing is that I've had this before, a couple years ago I already changed the RAM and SSD in it, after that I had exactly the same symptoms. The laptop was without battery for a year, after that I took it apart to take pictures of the motherboard, tried to turn it on again and didn't understand how it turned on. At that point I was literally just plugging and unplugging the PSU plug. This time that trick doesn't work.
Yes, the response to the "reset" button (or whatever it's called on Lenovo?) is the same as to the power button. I also looked around, and it seems that there is no CMOS battery (not designed in principle?).
Thanks for any help
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