Hi,
I'm sorry for writing in English, but I don't understand any single word in Hungarian and I couldn't find an English subforum there.
I have changed the LVDS controller and now it's working perfectly, but I need help with the backlight. The CCFL lamps in the screen are OK. I connected the screen to another inverter (from BenQ T705, made on TL1451 which also has "protect" function) and the backlight worked perfectly. Again, I connected other screen to the malfunctioning ILPI-075 inverter and the screen also goes blank.
I changed all THT electrolytic capacitors on the board, but not much has changed. Before, the backlight was turning off almost immediately, now it glows for 1-2 seconds and then turns off.
The HV side of inverter transformers is about 470 ohm, they look OK.
I measured random capacitor in the +16V line, which is supplying the high voltage inverters.
![](http://i.imgur.com/eMVfRnQ.jpg)
We can see how the voltage went down while the backlight was powered on.
Also, the ON/OFF signal on ICL837's pin 8 is always present after powering up the power supply, even after the backlight turns off.
I don't have any idea what to check now..
Üdv a lakóknak.
Adott monitoron randomszerűen az alábbi hibajelenség jön elő, függőleges csíkok képében.
Van amikor 2 hét, előfordult 2 óra használat után is. Egyéb esetben kifogástalan a kép, tehát nem fóliaszakadt stb. Első körben a táp nem megfelelő működésére gondolok.
Sziasztok acer AL1731 tipusú monitorba keresek kijelzőt aminek a tipusa HT-17E12-200 törött is érdekel de jó állapotú is. Üdv
Sziasztok! Keresek egy Acer AL 1951 tiusű LCD monitorhoz szervízdoksit.
Nagyon köszönöm előre is ha valaki tud segítei!