Laptop (Lenovo Thinkpad E540) screen is too dark. You can see a little if you use external light directly on screen and it's working properly with an external monitor.
I had two Thinkpad E540:
- A - Didn't use it, screen working properly, nothing broken but slow, small RAM and HDD.
- B - Broken plastic body and keyboard, problem with too dark screen
I put motherboard with CPU, GPU, RAM and HDD from B to A plus heatsink fan from B as A doesn't have dedicated GPU. (The fan is quite overheating, in need of change)
Then I did Factory recovery but the problem with too dark screen stayed the same.
I don't really know what could be the problem (maybe GPU?) so I will take the laptopt to repair shop, but that has to wait at least month. For now any idea?