V3-KE no boot, no display

Recently my KE has developed a blank display. It appears to power up, but nothing after that. I have tried manipulating the display cable to inspect for breaks.

After sitting for a long period of time (days) the screen did power up and appear to operate normally, but after some minutes went blank. No tapping of the display could revive it. At that time I inserted a USB stick and the display appeared to access to the USB. After a power cycle, the display no longer seems to access to the display.

Is it possible to diagnose if it is the driver-board or the display board? I would rather just not start throwing parts at it.