First, i dont work on monitors only on laptops and that also for a hobby. So, i received this monitor in the title and it was completely dead, and power supply when used was going off to a power protection. I found that one of the voltage regulators for backlight GS9238 is dead, so i replaced it and monitor is working fine now. But...on the main motherboard first thing i tested was a main power rail and after power jack there is one mosfet Nikos PD537BA. The thing is when i tested all pins of that mosfet are shorted in between. Now when i plug the adapter the monitor just goes on. I dont think its normal or? On my old monitor i have a power button but this monitor seems not to have it. So, is it meant to be like that? but if it is normal then it doesnt make sense to use mosfet there and short all three pins!? I believe that mosfet is dead but I am not sure/ dont understand. Thx in advance.
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Hello everyone!
As mentioned in the topic i am debugging a VG32VQ monitor which has a quite curios issue. For starters the backlight is working, the mainboard is also working and audio is being normally played thru the speakers. The problem of the monitor is that the screen is always blank(you can see the backlight turns on since the screen brightens a little bit but still black). When plugged into a computer the monitor is detected and HDMI signal is being broadcast to the monitor(checked with a data analyzer). The monitor panel should not be damaged but i am open to this option.
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Hi
Almost 2 years agoi got a monitor like this. Problem is, when i switch it on, always starts in factory mode: Red-green-blue-etc, colors repeating in loop.
I searched how to disable it and indeed it worked, but stays OK only until monitor is in standby .
If you cut the power or the monitor enters deeps sleep, it comes back the same.
I searched the internet and discovered that it is a very frequent problem with Asus monitors. Most of the users who "solved" this issue, replaced it in warranty period.
Some say: replace internal battery, but i opened the monitor... -
Hey guys,
i have a asus motherboard here and as the title says after the first mosfet (in the picture) there is nothing more than 3.15v.
I injected 19v and max. 1 amp at the charging port and there is not voltage drop or smth. It's just taking 19v and 1 milliamp.
Then i tried to inject 19v and max 1amp after the current sensor and there it first takes 19v and 4 milliamps and after 2 seconds it is taking nothing (no current).
I measured on the coils on board everything seems fine. Also the main power rail is not shorted (infinite resistance).
Now i thought something... -
I have an Asus GA502D, it had a blown mosfet which I replaced and the laptop booted into windows, a few mins later it shut off, the same mosfet was blown. I thought maybe just a bad mosfet but same thing happened again, a few mins in windows and shuts off.
I have removed the mosfet and can run the laptop no problem
The MOSFET is FDPC5018SG
Can anyone point me in the direction of what could be the cause of this, could it be the controller rt3663bc?
Thanks -
Normally, I never post repairs this quick after I do them, because… I am usually very slow.
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. 
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
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