I am another member of team Crossover that got hit with a hot MOSFET. I just registered to share my input.
Purchased in June from Bigclothcraft, fast shipping and good communication.
Fast-forward to the end of August, started having some intermittent flickering issues that would happen for a second or two at a time then go away. I sent a message to BCC and he responded very quickly and offered to send a replacement power brick. I accepted his offer and the power supply arrived 2 days later.
I used the new power brick and everything seemed fine for a couple of days until my monitor's screen would go dark (backlight would go out but power light would still be blue). I could tell this was linked to the backlight brightness as it would only happen when the backlight was anything above the minimum setting. Video here: http://www.youtube.com/watch?v=X0bjwnEI-Lw
I explained the issue to BCC and he authorized sending the monitor back via his account with DHL.
Seeing how many others had this issue with the mosfet on the LED power board I decided to crack my panel open and have a look:
So I dug up an old mosfet heatsink from a graphics card, cleaned the heatsink and mosfet with some rubbing alcohol, applied a tiny dot of Arctic Silver to the mosfet and temporarily secured it to the board with some double sided foam tape.
I hooked everything up and at first it seemed it didn't work (monitor would die if brightness was turned up). I tried power cycling the monitor a few more times and then it just worked, the monitor would stay on on the highest brightness. The heatsink did get hot to the touch so there is some definite need for some cooling.
I am going to attach the heatsink more permanently, I'm thinking a couple dots of epoxy on the corners and some Arctic silver in the middle of the mosfet, however I am open to suggestions
I am going to let BCC know about the issue and maybe we can both save some time and money by just getting a new LED driver board shipped out. Has anyone received a replacement board from any seller yet?
I heard a member say they didn't have a blue PCB for the LED driver board and instead a green one so I assume Crossover is aware of the issue and are using a different board on the newer panels they are shipping out.
edit: found a datasheet for the 18T10GH MOSFET used on this board, has a maximum operating temperature of 150 degrees Celsius and judging by the charring on most people's boards its hitting that upper limit.Edited by Teo14 - 9/27/12 at 4:05pm