Hello, Have you tried a different HDMI cable. Try a differnt HDMI input on your monitor, if available. Also may want to insure your power supply is 5 volt @ 2 amps or better. If you have a suitable substitute power supply, try it.
Have a look into Krescue. Among other things, it can be used to flash some firmware to the VIM2.
Plus, Krescue can be booted from SD card. If you can get your VIM2 to boot Krescue and it shows on your monitor, that may indicate that your hardware is likely OK.