Community Forum

Flashing black screen

Candjhamer
Regular Visitor

Flashing black screen

I continually have a flashing black screen. A technician came and ran a new line to the house and it was fixed for 2 days and today it started flashing black again. Any ideas on what the problem is?
nannyjackie47
New Poster

Re: Flashing black screen

I have had a similar problem Ever since they installed a new box. No tv at all for 3 days now. I'm 73 and that's about the only thing I can do is watch tv. They are sending repair man out on Thursday with a new box. Now no volume in my bedroom tv. They did the check that I already did twice today. So stupid.
Rustyben
Expert

Re: Flashing black screen

during the 'flashing black' screen issue, is audio interrupted? does it go and stay black? this is usually an issue with an HDMI cable bad or no longer seated properly at the set top box or at the TV end of the same HDMI cable.



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
Candjhamer
Regular Visitor

Re: Flashing black screen

@Rustyben-the audio goes out when the black screen Flashes. We have changed out the hdmi cord from the cable box-do you know why it would be fine for 2 days when the cable line was switched from the outside box To the house But the started again 2days later? We had a similar occurrence when we switched the hdmi cable from the cable box.
Rustyben
Expert

Re: Flashing black screen


@Candjhamer wrote:
@Rustyben-the audio goes out when the black screen Flashes. We have changed out the hdmi cord from the cable box-do you know why it would be fine for 2 days when the cable line was switched from the outside box To the house But the started again 2days later? We had a similar occurrence when we switched the hdmi cable from the cable box.

how is the set top box connected to your TV?  do other set top boxes in the home have the same problem or are they ok while that one is having problems?



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
Candjhamer
Regular Visitor

Re: Flashing black screen

Hi-We have multiple boxes none with this issue.
Rustyben
Expert

Re: Flashing black screen


@Candjhamer wrote:
Hi-We have multiple boxes none with this issue.

pick one working box and swap the set of set top box, hdmi cable, power supply from one TV to the other and see if problem moves.



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!