NOTE: Some troubleshooting steps may be different from your (Samsung, SONY, LG, Hisense, TCL, VIZIO) TV or remote control but generally will work the same to fix the problem. ... My Sony Wega will not turn on. When I turn on the tv it flashes the hisense logo briefly then turns off. Now the TV just won't show a picture. Sir I have 55uh7700-ub lg tv,the tv power supply light on but no picture black screen. FIX TV SCREEN THAT RANDOMLY GOES BLACK. 1. Hisense 50H5C LED tv has standby light, won't turn on I opened up and tested the standby voltage at connector but there is no printed voltage. In standby mode I only see .08 volts but when I press the power button I then show 3.8v. Tv power light will not go off, no picture. Technician's Assistant: Does the TV menu work? The red light in the corner is lit but when we try using the remote or the power switch on the unit itself, we get nothing. Yes also checked with cable company. Some TVs will turn the screen off but still play the sound if no movement is detected in the room. But, the user switched off the TV and switched on again, then it will show the last viewed channel on your tv. I turn it on the power/standby flashes green then red and no picture. Do you have the same problem on all sources/inputs? We have tried unplugging and plugging back in which did not help. If the user uses the Hisense smart tv for tunning the TV channels. Technician's Assistant: Anything else you want the TV Expert to know before I connect you? No. Our Hisense TV will not come on - no picture & no sound. Technician's Assistant: Are there any HDMI cables or A/V jacks (red, yellow, and white cables) plugged into your TV? Our tv has power to it but will not turn on. I have had the TV for just over a year with no problems. Check that POWER SAVER/ENERGY SAVE MODE is set to OFF. The HD box responds to the remote control. When attempting to power the unit on by either the remote or power button. (the power 13 volts ok back light volt each 115 volts) Likes ( 0 ) Dislikes ( 0 ) Reply It’s a Hisense 55” inch smart tv and it’s 4 years old. - Hisense Television No picture at all no just the tv no picture no sound just a blinking light. Technician's Assistant: Is your Hisense TV connected to a surge protector or power strip? If your Hisense tv turns on but no picture, then check your input source and the external device is connected properly and also check your device is switched on or not. Technician's Assistant: Have you made sure all cables connected to your TV are securely attached to both the TV and the outlet? It turns on, shows the Hisense logo and then goes dark. The stand by light is on indicating there is power. the red indicator light blinks 6 times and the blinking light disappears and the screen remains dark with no sound. 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