I have a Dell S2414H monitor that I got from amazon. I use it with my PS3 and Mac and it had been working fine for months, maybe over a year now. Recently the speakers stopped working but the audio still worked if you plugged in headphones - don't know why this is. A few days after that, the sound stopped working there too.

I've looked at everything I can think of. I checked to make sure both my PS3 and Mac were set to output audio through HDMI, made sure the monitor was taking audio in from the HDMI cable, wiggled the cable around, tried a different cable, reset the monitor to factory settings and I followed the User Guide instructions to turn off the monitor, unplug the monitor power cord, replug it, and then turn on the monitor. All of this to no avail. I understand the monitor isn't validated by Dell to work with the PS3/Mac so I tried it with a PC laptop too, making sure the audio was set to output to HDMI. Nothing.

While it was connected to my mac, I opened the Audio MIDI Setup application and it read "0 in/ 2 out" on the HDMI tab, which leads me to believe the monitor is not accepting audio input. I would be open to anything if it means I can fix this without having to pay out more than £20. I'd be fine opening it up and fixing the internals if I need to, I just want to play some GTA.