Appliance Repair Questions? Ask a Technician for Answers ASAP
This would suggest a hardware fault on the main board, unfortunately there isnt really any troubleshooting which can be done other than disconnect all but the power cable from the TV, and try and power it on to rule out a faulty input from a DVD player etc.
If you provide me your postcode I can recommend a suitable repair centre in your area.
I just wanted to follow up and check if you required any further assistance?