Prestigio PMP7170B3GCE, Service Manual And Technical Manual, Page: 19 / 41

1.Check if VCOM VCC is 3.6V(C1522) . if not, check U1522,R1550,R1560.
2.Check if AVDD VCC is 11V(C1557) . if not, check U1522,L1537.
4.Check if VGH VCC is 20V(C1518) . if not, check D1507,C1580.
5.Check if VGL VCC is -6.8V(C1592) . if not, check D1511,C1590.
6. if all VCC is 3V (C1576). If not , check U1520
7. Check if CON1503,EMI501~EMI507 fix well.
8. Check if LCD FPC connect well.
Troubleshooting 4 : Display Problems