Screen replaced but new part is not turning on [updated LED behavior]
I broke my SGP311 screen display by dropping it. Glass was intact but LCD was not readable anymore because a lot of stripes appeared on the screen and you just could not see stuff. Then I bought a replacement part on Ebay and following this tutorial I replaced the old screen with the new one and performed a test with the new replacement screen without gluing it in place and it is not working even though:
- when turning on, LED sequence executes properly.
- even if the screen is black, I am sure the tablet is turned on at this point because my pc detects it via usb cable.
- proper behavior also when turned off via power btn + vol up for 10 seconds.
As said, the tablet was working with the old broken screen, but now it's completely black with the new part. I suppose this is a faulty replacement part problem?
'''UPDATE: when the tablet is left turned on, at some point like after 30s or 1min, a blue notification light blinks, which is what happens when I detach the flex cable that connects the LCD to the motherboard.
How can I tell it's a faulty LCD and not a faulty flex cable?'''