> Red power light flashing, no other lights on display are on. [...]
"Red" or amber? Was there some causal event?
> [...] What does this mean.
It may mean that you haven't consulted the D6200 User Manual.
https://en.wikipedia.org/wiki/RTFM
Visit http://netgear.com/support , put in your model number, and look
for Documentation. Get the User Manual. Read. Look for the LED
descriptions and "Troubleshoot". Further reading might not hurt,
either.
You may be a candidate for the TFTP recovery scheme. See, for
example:
https://community.netgear.com/t5/x/x/m-p/1622096#M102004
