Just to chip in that i did mine today FOC, under 30 minutes. The place is far though and also just a heads up.
Call Betamek make an appointment first. After that upon reaching the Kilang/factory, the guard will direct u to park at the Service Area.
Next a technician will automatically come out and do brief inspection, have a look at your Perodua Service Book. He disassembles the HU and comes back 30 minutes - KAODIM. Go home lol
I believe this issue is common by now. Always doubt whatever the SC says!
Last time SC told me 3 months to fix and RM1k-3k so i never fixed it over a year LOL!
Myvi head unit white screen of death