To fix this no input signal issue you just need to change the input setting. Changing the input source Turn on the computer monitor.

If there is No Signal on monitor on a new PC, but the CPU is running, you need to take the following steps to resolve the issue.

If you wanted to use a computer LCD as a TV monitor, is there a cheap box that will convert a standard output from a VCR or DVD player to a VGA signal that an LCD would use?