Switch Mariko HAD CPU 01 - Joycons not connecting wirelessly - software issue?

this switch doesnt connect to jyocons wirelessly. the previous owner told me it had a orange screen and would boot with an error code. this wasnt the case. i replaced the wifi ic twice but the wireless joycon issue persists. everything else is fine. it seems tthis switch stays at the joycon logo a few seconds longer. when a switch halts at the joycon logo the problem is usualy the wifi ic. in rare cases its a software issue. do you guys think this switch could have a software issue or can other ics could cause such a behavior? thx!