Sony mbx266
Prblm- no turning on
Action -
Put DC supply amp - .005
After power btn amp same -.005
Stand multimeter and check
Vin section ✅
3v/5v coil NO voltage
Check 3v 5v IC ( RT8223m) requirment_____
Vin 🆗
3v LDO 🆗
5V LDO 👍
EN pin voltage 🆗
REF voltage noT generate
May be this line capicitor is faulty / IC faulty
Changed IC ( RT8223M)
prblm solved
Board trigger and ON , come display
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