Vu+ Uno No Video output on HDMI port

Hi
as title says it, i have got a second hand Vu+ Uno, i buy this box on ebay for 3-4 months a go. here the other day sundely when i come back from work the HDMI port was not sending any video out to TV.
I can use the box with Scart and can see TV, but when i try to use HDMI output there is no signal being send out. Is any one here heard of this problem ?

I used Black hole 1.7.0 image with it. but did update to the lates one, and even try Pli, Vix and still same problem no picture on HDMI port.
has anyone had this problem or heard or read about it, and can this be fixed ? if can be fixed how, what must i do to fix this.

thank you for replay.
No i have not tested VTI image, but have tested Open AAF , open Pli , OpenVix and still same , i get no video output from HDMI, scart works with all images

will later today test even VTI image and see if this helps.
Yes have tested with 3 diferent HDMI cables and still same result.

Yeep, have a Ultimo and a technomate 2T that works very well with same tv and hdmi cables. to me to seems like a hardware problems, but before i trash this , is there possibility to fix this