Flicker then display goes black
your monitor got trouble at:
1) monitor inverter board components fail like capacitor or MOSFET diver, it can repair or change this parts to fix.
2) there is disconnection between the inverter and CCFL lamps
need to check by technician, it could be fixed,
3) check the DCpower supply board capacitors swelling which need to reaplace, and fix it.
all steps need to do and fix it well.
hope help you something fixed, please take a rating let me know how much helped you thanks! keep in touch your question