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Toshiba tv when switched on no picture n no sound comes

Model no is CF2055A,Chasis no-9141.after hitting on the top n sides an orange line appears and then dissapears.

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**presuming** this is a horizontal, very thin line right in the center of the tube, and sometimes the picture is ok, then the vertical circuitry has one or more bad solder joints.

A ***QUALIFIED TECH*** needs to resolder the joints in this area. This is not a beginner soldering job. Special care must take place to avoid electrical shock or WORSE!! seriously.

Posted on Feb 12, 2009

  • Steve W Feb 12, 2009

    **presuming** this is a horizontal, very thin line right in the center of the tube, and sometimes the picture is ok, then the vertical circuitry has one or more bad solder joints.



    A ***QUALIFIED TECH*** needs to resolder the joints in this area. This is not a beginner soldering job. Special care must take place to avoid electrical shock or WORSE!! seriously.

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Toshiba cf32h40 started last week the pic would go down to one thin line i would hit it on the side and it would come back ,but now thin line comes back when i hit and then goes away so i took off the back...


that silver box is called TV tuner (see picture ) ............ but in your case that is not the problem ......... after 4 or 5 yrs (depending on usuage ) in some TVs on mainboard & CRT tube's circuit board at some soldering joints cracks develops ... then due to loose contact TV behaves as you have described ........ when you are hitting that lightly on its side then these cracks at soldering joints are getting connected temporarly & for few seconds or minutes you are getting normal picture ....... so solution is most of the soldering joints on mainboard & on CRT circuit board has to be resoldered ....... only good tv service engineer can do this without shorting joints or damaging components..... so that silver box ( TV tuner ) is not the problem because when it gets deffective then you will get picture that comes when tv is switched on ---- usually it will be blue screen ......& also if you connect dvd you will get picture normally ...only thing is that you won't get picture from cable or antenna .............. vishnuswamy_25.jpg

Sep 01, 2011 | Toshiba CF32H40 32" TV

1 Answer

Model 32A40. Picture periodically reduces to one narrow horizontal line. Becoming more frequent. Does this mean picture tube is going. What might potential repair cost be? thanks in advance.


No it is not a tube problem .............hit your TV on left side or right side or on top & then observe ..........you will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some TVs on main board ( also on CRT circuit board ) at some soldering joints crack develops....then due to loose contact picture becomes small in size or abnormal width, or rolls etc ...........when we hit that lightly then those loose contacts joins temporarly & again picture appears normally for some time............so solution is .....TV main board & CRT circuit board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting TV lightly if there is no response then main board has to be checked completely........in your case iam sure it is loose connection problem.........joints should be re - soldered ...100% it works again ................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other tools....................so contact good TV service engineer & just ask him to resolder joints .............iam from bangalore - computers, laptop, printers, etc ) ----- good TV service engineer will charge less .........

Aug 06, 2011 | Toshiba 32A40 32" TV

1 Answer

MY Panasonic TV Model TX -33P100X showing half picture and half black screen. When switch off and on again sometimes the picture reappear.


hit your TV on left side or right side or on top & then observe ..........you will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some TVs on main board ( also on CRT circuit board ) at some soldering joints crack develops....then due to loose contact picture becomes small in size or abnormal width, or rolls etc ...........when we hit that lightly then those loose contacts joins temporarly & again picture appears normally for some time............so solution is .....TV main board & CRT circuit board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting TV lightly if there is no response then main board has to be checked completely........in your case iam sure it is loose connection problem.........joints should be re - soldered ...100% it works again ................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other tools....................so contact good TV service engineer & just ask him to resolder joints ...........

Jul 29, 2011 | Panasonic Standard (CRT) Televisions

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hit your TV lightly on left side or right side or on top & then observe ..........you will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some TVs on main board ( also on CRT circuit board ) at some soldering joints crack develops....then due to loose contact picture becomes small in size or abnormal width, or rolls etc ...........when we hit that lightly then those loose contacts joins temporarly & again picture appears normally for some time............so solution is .....TV main board & CRT circuit board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting TV lightly if there is no response then main board has to be checked completely........in your case iam sure it is loose connection problem.........joints should be re - soldered ...100% it works again ................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other tools....................so contact good TV service engineer ........good TV service engineer will charge very less ...absolutely there is no need for new TV........if soldering joints are properly soldered then your TV will work for 1 more year ( minimum )......iam from bangalore - 09986222774 - sathyavijayasarathibabu@ymail.com ( computers, laptop, printers, etc )..............

May 12, 2011 | Standard (CRT) Televisions

1 Answer

After we have switched the TV on a dark line appears around the edge of the whole screen and then it gets bigger and bigger making the picture smaller and smaller - is there a simple solution please


hit your TV lightly on left side or right side or on top & then observe ..........you will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some TVs on main board at some soldering joints crack develops....then due to loose contact picture becomes small in size or abnormal width,etc ...........when we hit that lightly then those loose contacts joins temporarly & again picture appears for some time............so solution is ......TV main board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting monitor lightly if there is no response then main board has to be checked completely........in your case iam sure it is loose connection problem.........joints should be re - soldered ...100% it works again ................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other tools....................so contact good TV service engineer .............iam from bangalore - 09986222774 - sathyavijayasarathibabu@ymail.com ( computers, laptop, printers, etc )

Apr 25, 2011 | Panasonic Standard (CRT) Televisions

1 Answer

About 2 inches of the top of my screen won't show. Sometimes it will turn into a line that runs through the center horizontally. If I hit it it will go back to normal except still missing the top 2 inches


hit your TV lightly on left side or right side or on top & then observe ..........you will get normal picture or it comes & again it goes....if it is happening like that then following is the situation..........after 4 or 5 yrs in some TVs on main board at some soldering joints crack develops....then due to loose contact picture becomes small in size or disappears ...........when we hit that lightly then those loose contacts joins temporarly & again picture appears for some time............so solution is ......TV main board should be observed carefully & most of the joints should be re-soldered.......only a good service engineer can do that........even after hitting TV lightly if there is no response then main board has to be checked completely........in your case iam sure it is loose connection problem.........joints should be re - soldered ...100% it works again (2inch on top will also gets solved )................this problem cannot be solved by user unless user has idea about components( resisitors, transisitors, diodes,...etc) , have soldering iron , multimeter & other tools....................so contact good TV service engineer

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1 Answer

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sounds like a cold solder joint in the tuner circuitry. Unless you can do it yourself it's probably not going to be worth the repair bill.

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1 Answer

Toshiba CF36G40 36" TV Problem


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