A common problem with appliances that use transformerless power supplies is a shorted Zener diode, typically 12V 1W. This Zener regulates the supply for the IC(s).
I would think that the usual problem would be the conductive rubber keypad or the PCB contacts. Cleaning these with a cotton bud dipped in isopropyl alcohol should fix it.
The hynix HY5DU561622FTP-D43 is a 256Mbit DDR SDRAM:
The Eon EN29LV640B-90TIP is a 64Mbit, 3V flash memory:
The “EDGVA” devices appear to be boost converters/drivers for LED backlights, one for each LCD.
The “NA” parts are probably N-channel MOSFETs for dimming the displays (G/D/S = gate/drain/source) .
I find that clear, hi-res PCB images are best achieved with a CCD scanner (not CIS).
There are numerous examples here:
I use a Canon MP370 multifunction printer/scanner/copier.
I believe that TI’s CD3215C00 is a USB 3.1 redriver.
I believe that TI’s CD3215C00 is a USB-3.1 redriver.