Famicom Console with Software Set

Famicom Console AV Modded, USB Powered, Repainted
Super Momotaro Dentetsu
Final Fantasy III
Deep Dungeon III

About half a year ago, I purchased this Famicom console with the following modifications.
I was able to play games without any issues until recently.
There are some paint chips.
There are some chips that were present when I purchased it.

Cable length: 1.5m or more
AV Modded, USB Power Specification
Mainboard: Early model

AV Mod
Compatible with 3D Y/C separation devices
High-quality video output is possible
(Please prepare compatible equipment such as UC-XP1)

USB Powered
Mainboard cleaned with IPA
Plastic parts cleaned with enzyme bleach
Mainboard rust-proofing coating
Capacitor check or replacement with new ones
Vertical stripe countermeasures (21-pin jumper, 1μF x 2 + custom modification)
Microphone check
TEST-ROM operation confirmed

The software was also playable without issues on the Famicom console shown in the images until recently.

The save function is currently usable, but I cannot guarantee the battery life.