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Aric, Technician
Category: TV
Satisfied Customers: 41532
Experience:  15+ years in the field. Owner of AV Installation, OEM and Repair company
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no signal is on screen when SAT box is plugged into HDMI it

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no signal is on screen when SAT box is plugged into HDMI it just quit working Hitachi Ultravision P50S601 50 in. Plasma HDTV
Hello and thank you for the question.

Was this box previously working on this TV, and then the signal simply cut out?

If so, have you tried another HDMI cable between the two devices yet?

Have you also checked that the Input on the TV, using the TV remote's Input button has not been changed accidentally?
Customer: replied 2 years ago.

yes it was working ; tried other cable and tried xbox that peviously worked; the input is right

Thank you for the reply.

So you've tried another HDMI cable besides the one you originally used with this box correct?

Also, you stated the Xbox previously worked- was this connected with an HDMI cable as well?

If so, then pull that cable out of the Xbox and plug it into the Cable Box. Choose the correct Input. Do you still have No Signal with this cable box?
Customer: replied 2 years ago.



no signal

Then all signs point to the Cable Box being at fault, if you follow, correct?

Just to recap, Xbox still works on the TV if you test it right now?
Customer: replied 2 years ago.

no xbox not working either

is their some kind of fuse on the imputs?


Okay I understand, so it's all of the HDMI Inputs on the TV that will not work then. No there isn't a fuse for the HDMI circuitry on the Mainboard. HDMI is very finicky as it is the only connection that carries 5 volts of Bus power down the cable to transmit the signal. It is prone to failure from slight surges (even with a surge protector), Arcs from within the jack, or a cable that has failed. Unfortunately there are no settings, or buttons you can change to allow the HDMI jacks working again. You will need to have the Mainboard on the TV replaced (It houses the HDMI jacks and the AV connections). Average cost for this type of repair is around $275 parts and labor. You can use the link below to locate a service center in your area:


If you're instead looking to repair the set yourself, and save money, then you can purchase the Mainboard for your set and replace it yourself. It is a plug and play board and available at the link below for purchase:



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