The red crt for the set is going out, there are horizontal lines flickering back and forth through the screen near the bottom of the picture and it is getting progressively worse. Is this problem worth fixing? Or should I replace the tv?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
A flickering screen and or lines and or black bars at the top and bottom of the screen are signs that you need to replace any small electrolytic capacitors that are near the horizontal and vertical output transistors. any that are on the board on the back of the CRT and possibly capacitors in the high voltage section of the board. This is a cheap maintenance that is wise to do before any expensive parts go.
The adjsutment that you turned down was the G2 voltage to the red tube which is just a temporary fix for a CRT which has a short developing in it. Try turning up the red adjustment again only slightly to see if the red CRT ( tube) will light up
if it does and then the set shuts down its most likely the red CRT which is bad . If it lights up but you get retrace lines but doesnt shut down it possible that its the CR board ( Red CRT Drive Board) which is at the very bottom of the red tube.
I will assume from you description that this is a rear projection crt(picture tube) tv. if this is true I have good news/bad news.
faint red horizontal bowed lines in the picture indicate the screen(G2) voltage for the red tube is too high.Slight lowering of the G2 adjustment will eliminate these lines. I stress SLIGHT because too much adjustment will mess up the gray scale .
The bad news the red crt made be bad. if the adjustment works but in the future the problem reappears then suspect the red crt.red crt replacement is probably not economical to repair.
Sounds like you have an intermitant overdrive situation on the red CRT. This could be caused by a bad component on the Red CRT board, an intermittantly shorting CRT or the circuitry in the main board. You should not run it until the problem is resolved as you could damage the CRT if it is not already bad. This is something that unless you are a qualified tech you are not going to have any success resolving. It should not be very hard for a good tech to diagnose the problem. Costs will depend on the part which is bad. If it is the red CRT it probably is not worth fixing, but it could be a 50 cent capacitor. Certainly worth the cost of a service call. Good luck.