| This Samsung 713N LCD monitor came in with no | | | | it. True enough, after substitution with a known good |
| display symptom and no power. In other words, once | | | | board, the monitor is okay. So now we can confirm is |
| you switched ‘on’ you could see the power | | | | the mainboard faulty. The real problem now is at |
| LED lights up (no display) and then for couples of | | | | where we can find this board or the suspected part |
| seconds the power led light goes off. When I removed | | | | number SE7889-LF ic for replacement? Checking the |
| the signal cable and switched ‘on’, now I could | | | | components surrounding the SE7889 ic yield no result. |
| see the check signal cable OSD appeared at the | | | | As mentioned in previous articles, to troubleshoot LCD |
| screen. This proved that the inverter board, lamp and | | | | monitor is easy but to get the part is a little bit difficult. |
| power supply is working. Again, I plugged in the signal | | | | Samsung don’t sell you the mainboard, if you send |
| cable, the display and power LED light went off. | | | | to them for repair, they will charge a very high price |
| After opened up the cover, I check the on/off signal | | | | which is not worth to repair. |
| from the mainboard to the inverter board. With signal | | | | As I’m writing this article, I still could not locate the |
| cable in, there was no on/off signal to the inverter | | | | suspected ic, but if I found it I will let you all know. |
| board but when the signal cable was disconnected, | | | | Samsung 510bn lcd monitor also have this kind of |
| you could see clearly from your meter there is a on | | | | problem which is the mainboard spoilt. |
| off signal going into the inverter board thus the display | | | | Although in this article I could not pinpoint to you the |
| appeared with the check signal OSD present at the | | | | exact faulty component, at least you would use my |
| display. From this test, it is very obvious is the main | | | | procedure to confirm which board is giving problem. In |
| board problem. | | | | other words, whether you are troubleshooting the |
| To confirm whether is the main board problem, you | | | | Samsung 713N LCD monitor or other brand, the testing |
| have to use a similar Samsung 713N model to confirm | | | | method is the same. |