[Wren]

I've had that same problem. I've tried unplugging, and also tried installing new INF files, plugged it in directly to the wall, like the sony trouble shooting guide says to do. Also did the monitor self-test (power up the monitor while disconnected from the PC, press 'right' for about 2 seconds on the thumbpad) But nothing happens in my case. It's weird, 'cause if I let it cool off for a while, then come back and turn it on, it works fine for about 10 minutes, then shuts down. As if it's a heat problem or something. Repairing it with Sony will cost about half the price of the damn thing. ($275)

[in need of help]

hmm.... i have a sony hmd-a400 monitor, ive had it for about 6 years. somehow, i see a blank screen and a orange light blinking next to the power button of my monitor. I unplugged the cords and plugged them back in but it still doesnt work! help me out please!