A friend of mine brought an Akira 14'' colour tv for repair with the above mention fault.Atimes it will take 30-40mins before the raster comes on and after about 4mins it will fade away with the standby light still on.
I discovered dry joints on the panel board and resoldered it.The raster came on immediately I switch it on but fade away again within 5mins.This fault always connect with the video board so I also check for dry joints and resolder it but the problem persisted.That is it with repair,you need to have a persistence spirit to be a good repairer and if you have professionals around it will hasten up your learning.There is hardly any fault you may encounter on your repair work that someone somewhere hasn't pass through and sharing it with them will help a lot.
Back to what we are treating,I checked +180v supply to video board,it was there.I hold on to the board tightly and noticed the raster came on and fade away as I leave it.This is a sign that the tube base is having problem.As the tube base was replaced with a new one the fault was cleared and the raster came on for more than an hour without fading away.
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