suddenly the HD channels are not seen and the led turns off the signal

[lastone]

Often it is happening that during the vision, Sky HD channels hang and the signal led is off. Box is very hot, channles not HD are visible normally. To solve the problem sometimes is necessary to reboot, other time it is possible to solve only to take off it for several minutes.
There are no obstructions to the slots
It all began with the installation image nemesis of May and the heat of the last period

Please could you help me?

[Manic01]

More info required.

[alom5]

if it all started with the new image installation....maybe you should try a different image or reflash the image again as sometimes you can get bad flash.