Black screen no power up - Vizio VF550M 55 in. LCD HDTV

Possibly it's the video card and then you will have to change the mothreboar.

If you're getting just a flashing cursor on a black screen it's probably a motherboard/video card/hard disk problem (probably motherboard).

If there's not even a flashing cursor - just a black screen - you can add a failed power unit to your list of problems.

The easiest way to check is to borrow a power unit and video card from a friend's computer. There's no need to remove your existing power unit. Simply disconnect the power cables from the motherboard and connect the spare power unit in its place.

If your computer powers up it is obviously a faulty power unit to blame. IIf there's still nothing on the screen, power down the computer and replace the video card with the spare one. If there's still nothing on the screen when you power it up then in all probability your motherboard is history

If the battery is good, mine died after 4 years, check the settings in Power Options, look for dim when on battery power. Increase the % to Max or 100%. see what happens. Still have problem consider replacing Battery.

If screen is black you have 2 situations: camera is power on or power off. If its power on and screen is black, its very possible to have something defective inside on the cam microcomputer board or with the display block, and my suggestion is to get to a repair shop for a test or if you are still in the grace period from the manufacturer, to ask for a free investigation. Cheers (PS sometimes black screen occurs when the LCD inverter is gone)

perform power drain. take out the battery and unplug the power adapter. press and hold the power button for 30 secs. put the battery back in and plug in the power adapter then turn on the computer.

I’m happy to assist further over the phone at https://www.6ya.com/expert/ramy_d9e7ebea3891f482

or screen probably is burned...
or inside crystals are broken..
u have to buy a new laptop

i just repaired a HP1955 monitor,the symptom was: when you power up the monitor,it shows on screen a desktop,but after a sec is screen going black..this repeats continously...

i just resoldered the AC cord connector on power board and also the impulse transformator...now the monitor is running good..
sry for my english,im from Slovakia

i had the same problem now my monitor wont even turn on if i do that the power light just keeps blinking maybe its a sign of a dying monitor

how can u fix this black screen? the green power light is on, shows vista for a bit then turns black and stays black. any solutions or do i have to send it back?

Monitor Help CH000315, Black borders on side of screen. CH000316, Dead or black pixels. CH000403, Macintosh and/or PC monitor compatibility.
Black borders on side of screen. Additional information about what causes black borders on computer displays.

Good Luck, Please dont for get to Vote/Thank You.