HDMI connectivity issue on Philips TV 42PFL8404H/12

Hello,

We own a Philips TV 42PFL8404H/12 (serial number: VN3A0950093125). Upon our return from vacation, we noticed the following issues:

New TV boxes => No sound but image ok;
PS3 => Black screen with the message "No video signal,"

Both devices are connected via HDMI and were working perfectly two weeks prior (devices were not unplugged during vacation).

Here are the tests performed:
- PS3 tested on another TV with the same HDMI cable => PS3 OK;
- I switched between all HDMI ports (4) => no effect;
- Swapped HDMI cables => no effect;
- TV firmware update => no effect;
- Rebooted all devices => no effect;
- Reset the TV to factory settings => no effect;

Everything else works perfectly fine (sound and image in TV and USB mode).

I therefore think the problem is related to the HDMI connections... But what is it and, more importantly, how to fix it??

Thank you in advance for your help.