When I turn on the tv it flashes the hisense logo briefly then turns off. Tv power light will not go off, no picture. Technician's Assistant: Are there any HDMI cables or A/V jacks (red, yellow, and white cables) plugged into your TV? 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. In the back of cable HD unit. Sir I have 55uh7700-ub lg tv,the tv power supply light on but no picture black screen. But, the user switched off the TV and switched on again, then it will show the last viewed channel on your tv. The stand by light is on indicating there is power. (the power 13 volts ok back light volt each 115 volts) Likes ( 0 ) Dislikes ( 0 ) Reply It turns on, shows the Hisense logo and then goes dark. No picture at all no just the tv no picture no sound just a blinking light. FIX TV SCREEN THAT RANDOMLY GOES BLACK. ... My Sony Wega will not turn on. 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 Hisensense 5020DUS blacked out botht sound and picture without warning. I turn it on the power/standby flashes green then red and no picture. Technician's Assistant: Have you made sure all cables connected to your TV are securely attached to both the TV and the outlet? It’s a Hisense 55” inch smart tv and it’s 4 years old. The red power light flashes 6 times then gos - Answered by a verified TV Technician. Now the TV just won't show a picture. We have tried unplugging and plugging back in which did not help. I have had the TV for just over a year with no problems. the red indicator light blinks 6 times and the blinking light disappears and the screen remains dark with no sound. Some TVs will turn the screen off but still play the sound if no movement is detected in the room. Technician's Assistant: Is your Hisense TV connected to a surge protector or power strip? The HD box responds to the remote control. Do you have the same problem on all sources/inputs? If the user uses the Hisense smart tv for tunning the TV channels. Check that POWER SAVER/ENERGY SAVE MODE is set to OFF. One, whenever I turn the TV off via the supplied remote, it turns off, but when I go to turn the TV on at a future time, via either the remote or the power button itself on the TV, the front indicator light turns from red to blue, but no picture ever appears, just remains black. Yes also checked with cable company. No. Technician's Assistant: Anything else you want the TV Expert to know before I connect you? 1. Technician's Assistant: Does the TV menu work? 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. Our Hisense TV will not come on - no picture & no sound. 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