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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
Apex Problem

 
 


Jedibuckeye
New User

Aug 28, 2007, 9:04 PM

Post #1 of 5 (971 views)
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Apex Problem Can't Post
So my father gave me his old Apex flat screen tv after buying a plasma. It worked perfectly until a month ago when the picture went out the screen turned blue and white lines moved up the screen. The sound still worked fine. yesterday i gave it a try and it worked fine but now it is acting up again any advice i know it still works it has to be a part problem?



terminator
User

Aug 28, 2007, 9:14 PM

Post #2 of 5 (969 views)
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Re: [Jedibuckeye] Apex Problem [In reply to] Can't Post
try resoldering any suspicious solder joints


Jedibuckeye
New User

Aug 29, 2007, 1:41 AM

Post #3 of 5 (952 views)
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Re: [terminator] Apex Problem [In reply to] Can't Post
No nothings lose or broken.


terminator
User

Aug 29, 2007, 1:52 AM

Post #4 of 5 (951 views)
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Re: [Jedibuckeye] Apex Problem [In reply to] Can't Post
that can only mean your tube is going out. the tvs now in days are not well built like they used to be.Frown i had the same problem with one of my older tvs it was a 1983 rca colortrak it did the same thing your tv did


(This post was edited by terminator on Aug 29, 2007, 1:53 AM)


rrobor
Veteran

Aug 29, 2007, 9:51 AM

Post #5 of 5 (941 views)
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Re: [Jedibuckeye] Apex Problem [In reply to] Can't Post
If its bright blue with retrace lines you could have two faults. one your blue video output transistor is failing and the voltage to the cathode is going low or 2 you have a heater cathode short which drops the cathode voltage. If you have a volt meter try reading cathode voltages, They are usually marked R,G and B on the tube base, they should be roughly the same normally around 160V. Blue should read low. If it does, switch off, slip the tube base off the tube then try again. If blue is now correct its the tube and it can be fixed. If not its the blue output , have a good look at what that is, if transistors, exchange them and see if thefault moves etc.

 
 
 


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