CRT (cathode-ray tube) television sets have gone down in popularity with the introduction of large screen, slim and flat LEDs and LCDs. However, there are many consumers who still have their CRT sets and are satisfied with them. But many problems often relate to the picture quality, picture color and clarity and sound quality of these CRTs. Sometimes the cost of repairing such common problems with CRT TV exceeds the cost of replacing it with a new TV.
Here are some common problems with CRT TV and their diagnosis:
CRT television has no image
No image is a very common problem with cathode ray tube TVs. If you are facing such issue then check the obvious things first i.e. verify whether your TV is plugged in correctly and is receiving sufficient power for operation. If the power is OK, then check the video settings (like brightness, sharpness, contrast and picture settings). If the settings are fine then there can be problem in the video cable and hardware. If the basic diagnosis comes out fine then it might be the time to call a professional TV repair person. (Picture Source: www.overclockers.com)
Bowed picture or images not lined up
This is a very common picture problem with CRT TVs. It is usually caused by the failure of an internal circuit called the convergence circuit. The circuit has convergence ICs, which when go bad create the problem of bowed picture. Sometimes bad or faulty soldered-in fuses and resistors can also cause image distortion. A technician or a PRO can easily repair this sort of problem in-home. (Picture Source: www.justanswer.com)
CRT displays one horizontal line in the center when turned-on
Many time it happens that there appears a single thin horizontal line on the CRT TV screen. The probable cause of this problem can be a faulty yoke with a defective or burned coil inside it. The other probable cause can be loose contact between the yoke and the main board. The third possible cause can be a defective capacitor. (Picture Source: www.static.myce.com)
Single vertical line in the center of screen
Some time when you power on your CTR TV you see a single thin vertical line on the screen. The probable cause of this problem can be a faulty yoke with a defective or burned coil inside it. Other reason can be defective vertical ICs. The ICs may have lost contacts with solder joints because of the heat production during operation. (Picture Source: www.jestineyong.com)
CRT TV crackles when powered up or emits a strong electrical odor
This is not a very common problem. The most prominent reason is cathode ray tube failure. The minor crackling noise is due to high voltage arcing. The possible reason behind the burning smell is caused by insulation burn. In such situation, immediately unplug the TV from the power outlet. Call a professional TV repair person and get it corrected.
Colorful shadows on the sides
Whether you have a CRT TV or owned it before, you must have witnessed at some point of time, a colorful shadow on the sides of the screen (can be seen as reddish orange shadow in the picture). It is mainly due to presence of any magnetic device near the TV. Magnets placed near a CRT can damage the set’s “shadow mask,” which can cause the wrong colors to appear in that area. (Picture Source: humphreykimathi.blogspot.com)
Shadow mask is located behind the glass screen, as shown in the above graphical Cathode Ray Tube picture. High-power magnets can sometime cause permanent damage to the CRT. (Picture Source: www.wiztech.wikispaces.com)
Bad sound or no sound from the TV
No sound or less sound is a commonly heard problem with CRT TVs. The most possible reason is faulty speakers. Other reasons can be damaged audio amplifier, a low supply voltage to the amplifier or a faulty audio IC. There can be other reasons as well like some faulty internal wiring.
Other frequent problems with CRT TV are loss of vertical sync and loss of horizontal sync in the picture. (Picture source: www.ronelex.com)
Problems with CRT TV remote
If you’re facing problems with TV not responding to remote inputs, first replace the batteries! If the TV still isn’t responding, there’s a problem with the remote. In this case, it is better to replace the remote instead of repairing it. Below are some CRT TV compatible remotes that we recommend.
LipiWorld® 6710V00078C TV Universal Remote
An absolute essential for your TVBest quality plastic body and soft rubber keypad
- LOHAYA 3 in 1 AA59-00345A,AA59-00345B,AA59-00345C Samsung CRT TV Universal Remote Control Compatible for SG58 Samsung CRT TV
- LipiWorld® RM-GA002 SY32 CRT TV Universal Remote Control Compatible for Sony CRT TV
If your CRT TV is troubling you with the picture problems, sound problem or any other issue, connect with Mr. Right. Dealing with the common problems with CRT TV on time will help you in avaoiding any serious damage in future.
For more information on consumer electronics functionality and care visit Ideas by Mr. Right
OnePlus 138.8 cm (55 inches) Q1 Series 4K Certified Android QLED TV
Smart TV Built-In Wifi4K Ultra HD (3840x2160) with Motion Rate 480 Hertz and 4 HDMI ports (HDMI 2 supports ARC) to connect set top box
If you are planning for a New TV, we have some more recommendations for you :-
- Samsung 108 cm (43 Inches) 4K Ultra HD Smart QLED TV QA43Q60RAKXXL (Black) (2019 Model)
- TCL 138.7 cm (55 inches) 4K Ultra HD Certified Android Smart QLED TV 55C715 (Metallic Black) (2020 Model) |with Voice Control
- Sony Bravia 138.8 cm (55 inches) 4K Ultra HD Smart LED TV KD-55X7002G (Black)
- LG 139 cm (55 inches) 4K UHD Smart LED TV 55UM7290PTD (Ceramic BK + Dark Steel Silver) (2019 Model)
(Cover Picture source: www.blogs.which.co.uk)
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Hi i have samusng slimfit crt tv 54cm and problem is like your second picture Bowed picture or images not lined up , only my is colors is clear. I open tv but there is no crusty, discolored parts. Can you hellp me what is problem where to look? Thank you.
I am leaving service of tv repair
Hello I have Sony Bravia 21″. It is showing the colors but shades have changed. Everything else is ok. How to resolve this ?
Hi I own a 25″ Dynora CRT TV, which suddenly goes completely blank, no picture and no sound, and comes back to normal after some time, which is again uncertain. My mother who is 76 mostly watches and keeps getting annoyed often. At times she keep tapping (like a slap) on all the sides of the TV, when suddenly the picture and sound come back to normal again. Can anyone suggest a remedy please???
Onida TV Model CO21STP1200B Set dead just power cord is ok no stand by light TV not able to on what are the causes ?
sir ,i have a HAIR tv which power on but no picture and no sound ,but after few minit sound and picture ok,sir i could not fix that problem,so please help me
Lg moniter horizontal line
vert and hor. problems are backwards
Can we switch on colour TV without picture tube, to test the SMPS powersupply 110Vdc and 18Vdc.
If possible, please tell me the procedure.
Have a CRT tv connect with tatasky dth. All of sudden a week before, brightness rapidly changed down that could not see the images and just look dark. To add, the digital picture quality changed to cable kind quality. When asked ts, say problem with tv. how to rectify this brightness prob?
why damage a resistance of color TV? when i connect a resistance it would be burn and damaged..
Problem with my TV is that, its off automatically with louder and longer sounds (Different). After some time, when we switch on TV, its became ON, but after some time its off with same pattern. Its ON time is vary from seconds to few hours.
not sure why you used my name lol, all I can say is its either bad solder joint or some kind of protection mode, failed relay, or bad power button or rotary switch if its old enough
My TV display blue and diagonal line how can I fix this?
my television philips 14 inch is given only one colour what problems soon reply me thanks.
Can anyone help me in solving my TV Problem.
Problem is whenever i switch on the tv it opens with a channel and it cant be changed. And if i make my remote to change means the TV gets switched off and at once it Switch on automatically. Whatever buttons are pressed the same issue is happened. kindly help me with a reply.
Hello, my CRT tv is displayign gray flickering pixels. The vhs player that controls the tv shows the correct stations. All things are plugged in. Please advise.
If there is a single horizontal line, it means there is a fault in vertical section. Normally it is caused due to either or several of the followings: 1. vertical yoke failure, a very very low chance
2. Vertical IC failure
3. No supply to vertical IC
4. Coupling capacitor failure.
If there is a vertical line, the horizontal yoke connection will have gone bad (dry solder, connector pulled out), H coupling capacitor gone bad or loose contact. Very rarely Horizontal yoke goes bad.
that’s a very good answer, I’m not sure where this signs of crt failure post came from, I was searching for images specifically trying to isolate or at least take a guess if my zenith chromacolor II had a worn crt or a fault worth recapping the entire set, it was in use for a long time so even though ive heard these delta gun tubes were very good, its still possible mine is just at EOL
thanku
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I want to purchase of 40 inch latest TV, which company TV is good cheap and best.
CRT displays one horizontal line in the center when turned-on. but after 30-50 minute picture show naturally. whats the problem . please solve and give me answer. Did I exchange the TV before,,,?
I have one Onida color TV . One day TV ON condition thunder storm shock is happens, I opened that circuit board and saw, in that some components and tracks are all blown up.
So I decided to plan change with new PCB which is suitable for that.
Wires and all connected to CRT tube using remote switched ON the TV set but small switching sound is coming form tube but tube is blank condition only.
May I know what is the reason for this. Please help me to resolve this issue.
Regards,
Ravin.
LG CRT TV ROLLING DOWN
Dear Friends, I have LG FLATRON CRT TV, the picture is rolling down. what to do ? its not standing center, its going down. I changed some e-capacitors, but no use. If i change the Vertical IC, the problem will solve? or what to do? Thanks to all in advance…….. The problem is crt tv vertical sync lost, please help me
LED have lower requirements but in turn they are more efficient in turning the power to light with minimum heat loss. Thus, the heat generated from the LED Tvs are nearly minimum as compared to other types
I have present problem on sharp GA4M chassis with vertical bar on left side of screen, creating more/double image on screen. power supply filters did not solve the problem. Hope you can give me possible solutions on this,,
I had a TV from 1983 with a CRT failure, i.e. the crackling when turned on. I was going to keep the TV thinking it was just a quirk of the TV. But after reading this article I’ll take it to a recycling center. Thank you for writing this article, I very much appreciate this helpful information. I’m glad my house did not burn down.