Lines of dots on certain games

[metalinc]

Hi,

Certain games are displaying lines of dots. See attached pics.

My console is a frontloader NESA-001 PAL Asian but i replaced the CPU PPU and Crystal with the ones from Famicom HVC-001.

Can anyone please advice what to do to fix this?

[P]

Most likely dirty video pins on the cartridge or in the cartridge connector. Clean the pins with 90%+ isopropyl alcohol and a toothbrush or cotton swabs for example and let it dry for some time before you turn on power again. There should be guides if you search the internet.