I have an apex 4088,have had it for 5 months.Suddenly I only have sound,no picture
If sound is OK and there is no picture, means the video processing section of your Apex TV is faulty. It may be either to the absens of voltage or a damaged processor IC inside the circuit board. Being a new set, it will have guarantee. If it is in guarantee period, get it service by the Authorised Service Center for Apex. The processor board costs some more. Do not open it, if guarantee prevails even now. Opening the set for any purpose will void the guarantee. OK.