Repair brymen 786

[ss78]

Hi folks

I have a dead bm786.
Inserted new fresh batteries, rotate the switch, unfortunately no display..

Could anybody with knowledge guide where to start probing/ troubleshooting ?

Background : I m familiar with simple circuit, have another working fluke multimeter

Greatly appreciate it.

[ss78]

Preliminary probing.
Output from linear regulator is normal about 3.5v

There is 3.5v into ic which I believe is a microcontroller.

No short found on any caps ...

[Antrus]

hello, can you share eeprom 24cs04? It's on a board with buttons.