Hi, my sinotec 40" does not want to switch on. No screen, just the constant green blinking light at power button. Help please

SOURCE: power supply light has blinking green light

If the power box is bad, The computer will not come on. if you only get a green light, you would need to start with replaceing the power box, if you get a new one and the same thing happens, then the mother board is bad too.

SOURCE: HP FLAT SCREEN TV BLINKING POWER LIGHT/BLACK SCREEN

sounds like the power supply has gone bad.

SOURCE: power button is green - no blinks / no picture / no sound

Unplug it from the wall, wait 2 minutes and plug it back in. if problem still exists, its probably the main pcb.

SOURCE: magnavox 37" flat screen model no.37mf23id/37

Yes, he means 2200 microfarret (called uf from here on out). Another important concern when buying a replacement is the voltage. You need to get something that is at least 25v. I recommend a 35v or better. Another notable point is that this may not always fix the problem. As with mine, there was also a 1200uf (microfarret) 35v capacitor that was blown. You can tell this because they bulge at the top. I have both of these caps (2200uf 35v and 1200uf 35v) on order and they will be here tomorrow. If I do not post back here then they fixed the issue for me. I suspect that this will resolve the problem. Look for bulges on top of the caps. This is an indication that they are blown. Most all of you experiancing these symptoms will see the 2200uf cap bulging but you may also see others bulging too. If you do then you need to replace those too. No electrolitic capacitor should be bulging at the top so if its bulging its bad, and if its bad then your tv will definitely not work. Have fun.

Ben Wabnick

• 2404 Answers
• Posted on May 01, 2010

SOURCE: Light on power on switch keeps blinking, screen blank.

Definitely a problem with the monitor. If you can get the back open then look at the main board and the power board. You will want to look for puffy capacitors. Instead of a flat top it will look puffy like its pregnant.

If you find any like that then you need to replace them with new capacitors that have the same Uf rating and at least the same voltage or higher.

This will take some unsoldering and soldering skills. Make sure the stiped edge gets aligned with the striped edge on the board.

If you replaced them then the monitor should turn back on. If it doesn't then its a screen problem and you'll need to get a new monitor.