Acer A221HQV Acer A221HQV LCD Monitor Service Guide - Page 37

5. Troubleshooting (continued) ACER A211H/A221HQ 35 Go to contents page 5.2.2 Nothing displays on the screen (Screen is black and colour of LED is blue)continued: Continue Check the 3.3V power are supplied on I301 pin 2. OK Failure Point Check if the voltage on NG NG 1) Printed wire broke between CN301 I301 pin 3 that is power DC at 5V. pin9, 10, 11 and I301. 2) Check power board. OK Failure Point I301 is failure. Check the 1.2V power are supplied on I302. OK Failure Point Check if the voltage 1) Printed wire broke between I301 NG on I302 pin 3 that is power DC at NG pin 2, and I302 pin 3. 3.3V from I301. 2) Both D313 and L313 are open. 3) I302 is failure. OK Failure Point I302 is failure. Next Page