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:

http://www.alldatasheet.com/datasheet-pd...

The Eon EN29LV640B-90TIP is a 64Mbit, 3V flash memory:

http://pdf1.alldatasheet.com/datasheet-p...

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:

http://www.hddoracle.com/viewforum.php?f...

I use a Canon MP370 multifunction printer/scanner/copier.

I believe that TI’s CD3215C00 is a USB 3.1 redriver.

https://forum.hddguru.com/viewtopic.php?...

I believe that TI’s CD3215C00 is a USB-3.1 redriver.

https://forum.hddguru.com/viewtopic.php?...