Would be great if you could give us a bit more information, for example:
-> did you got that switch dead or have you used it before/have you used CFW before
-> what did you do the last time your switch worked, examples include:
- "i ran some random NSP/Game i found online, my switch blackscreened and didn't turn on afterwards"
- the same as above but with a payload
- "i recently tried to downgrade and failed"