Iiyama 17inch LCD AS4314UT green power light, no display

[broadcom]

Hi !

I am hoping some kind soul here will be able to help me with this monitor. The symptoms were progressive, first it started blanking the screen for a few seconds at a time when cold. Then the OSD would freeze while it was doing it's autoconfig. Finally, when powering on, the power light would go straight to green with no backlight or lcd display coming on. A lot of unplugging and plugging back in would sometimes get it going for the rest of the day.
I eventually took it apart and replaced all the electrolytic caps on the main board (none were visibly damaged) and lo and behold the monitor worked for a few days before finally giving up. Now the power light goes straight to orange and stays there.

The only thing I have noticed (it's been lying open on my desk for a week or so) is that the component marked in the photo (L200) had a drop of liquid on it. I don't know if that was electrolite, condensation or cat drool... Can anyone help identify this component (I'm an amateur..) it has no markings. Any other ideas what could be wrong?

Thanks!

[kc8adu]

Re: Iiyama 17inch LCD AS4314UT green power light, no display

probably glue.
you need to clean the brown glue from under the big coil on the logic and the 2 on the inverter.
it eats the traces.
some of the smd lytics are likely bad too.

[simas]

Re: Iiyama 17inch LCD AS4314UT green power light, no display

chek capasitor power high voltage, leak

[broadcom]

Re: Iiyama 17inch LCD AS4314UT green power light, no display

Thanks for the replies!
Cleaning the glue around the coils hasn't helped. The traces underneath look OK.
How do I get the values of the unmarked smd lytics? Do I need a schematic, if I email iiyama will they give me one?
@Simas: how do I find the cap you're talking about? The power supply is an external brick giving 12.something volts, seems to be working.

[arneson]

Re: Iiyama 17inch LCD AS4314UT green power light, no display

I just aquired a monitor that was behaving badly.
Eratic symptoms all caps were ok, inverter was not bad.
I have a few of the cheap cheap chinese universal power bricks.
The ones that switch from 10 to 20 volts at a few amps.
They can be handy sometimes.
I bumped it up to 14v and plugged into old monitor, been using it for a week now with no problems.