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In recovery mode you use the volume and power buttons to navigate to the option you want to select. Recovery mode is basically the same as safe mode in Windows. Only the bare bones of the os is loaded hence why touch doesn't work.

Hi there, Is the display setting set to always on?

Hi there, You could open it up and reconnect the cable for the front panel to see if that helps, it's passivity that just the panel is faulty, if it has a remote, you could try to set it to cd and try to play a cd or radio and increase volume to see if you get any output?

You can replace your HDD with any type of 2.5“ SSD. The only differences is the type of memory the SSD uses and how many read/writes it can handle over it's life span.

Hi there, The power switch may be the issue, it could be the switch itself or cold solder joints on the power switch. If it has a sliding on/off switch the little arm on the switch could be broken meaning the part you slide has nothing to catch on to to move the physical switch to the on position.

Hi there, Do the fans work just not the leds on them? If so, it may be simply be that the leds are faulty or not properly connected. For the no signal issue, remove the gfx card plug the video cable into the on board graphics port and see if you get display. If you get a picture then shut down again and reinstall the card, install the power connectors to the card. If you have a multi meter you can measure the voltage on the 12v connectors, one of the rails may be faulty. If it still does not work then it is likely the motherboard is faulty and cannot distribute the power that is required.

Thanks for the voltage readings however it is likely the psu, voltages will look normal when idle but drop when the psu is under load (power up). Have you checked visually the psu? Caps bulging etc.

It does look like components are missing from the board. I personally would rip out the preexisting components and just do an LED mod on it, you won't have a dimming feature but they will definitely out perform a flo bulb.

Have you checked to make sure you have the correct driver installed? What os are you using? If you have the right drivers try uninstalling the device, also deleting the driver files then connect it again.

Check the chassis to ensure it is all closed correctly, the system may not power on if the projector detects the lid is open. Do you have a model number for it?