Display Shutdown In BenQ 15″ LCD Monitor
This LCD Monitor BenQ FP567S with the model of Q5C3 came in two weeks ago with no power symptom and found that few of the power components have problem. After problem was solved the LCD Monitor went to soak test for couple of days and carefully packed into a box and delivered back to customer which was from another state. Few days later got a call from the customer saying that the moment the power was “On” the display came out for a while and shutdown. But at my technical place here the LCD monitor worked just perfectly good.
After got back the Monitor from the courier company as usual, in order to find out the reason why, one have to remove the cover and check it out again. After scanning and performed few test at the power/inverter board, the conclusion was that the boards were okay. So now the concentration was in the backlight. Since i have some used LCD monitor that have the same connector, it would be easy for substitution purposes. And the result was……… the bottom backlight have problem because after substituting the bottom backlight with a good one, the display never shutdown anymore. The next step was to remove the bottom the backlight and see how was the condition. To my surprised the backlight broke inside as seen from the photo below.
A replacement brought back the good and stable display-no more shutting down even after few days of burning in. I was wondered why the backlight could break internally because before the shipment the LCD Monitor worked just fine. The packing was good with many areas was covered with thick sponge. I could conclude that it may be due to very rough handling by the transport company. I did not suspect the customer (it could be the customer dropped the monitor on the floor) because there were no dented marks at the angles.
I already spoke to the customer and she will be calling the transport company to handle the box with care and hope no more similar case. I gave the customer free of charge since it was not them that broke the backlight. This time round had put extra careful in packing the LCD Monitor and will be sending out the box tomorrow.
By the way if you have the schematic for AOC colour monitor model: 4vrl,FCC ID ARSCM 3500
kindly met me know. Thanks!