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Toshiba MW24FP1 with thin white lines across top of screen    
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NightStalker62



Joined: 16 Sep 2010
Posts: 5

PostPosted: Thu Sep 16, 2010 5:35 pm    Post subject: Toshiba MW24FP1 with thin white lines across top of screen Reply with quote

ok, i have a problem with my television that started a couple of weeks ago. this is my first problem with the tv and i'm hoping i can take care of this myself. i also hope someone here can go above and beyond and explain what i need to in simple terms since i have no clue what the terminology is when it comes to tvs.

the problem is as follows: i have thin white lines going across my screen. sometimes it covers the top 5 inches of the tv and other times it covers less than one. sometimes it changes between channels and sometimes grows or shrinks out of nowhere. it used to go away after having the tv on for a little but now it's always there, regardless of how many lines there may be. below is a picture (i stole the picture from someone else on these forums who had the same problem since i can't find my camera) of what it exactly looks like.



like i stated above, could someone please explain what i need to do like i'm a child? that includes the parts i'll need and the steps i need to take to get it done. i know it's a lot to ask but i need this tv to last a couple more months and i really don't want to have to pay extra to get a repairman to do it.
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JTS1957



Joined: 21 Jan 2009
Posts: 2347
Location: Far, Far Away

PostPosted: Thu Sep 16, 2010 9:24 pm    Post subject: Reply with quote

Goo Goo Gah Gah - well maybe not that young...

You most likely need to replace an electrolytic capacitor at board location C427.
It will be located on the board with a flyback transformer (has thick red wire going to bell of tube). It will be found in the right corner of the heat sink IC401 is mounted to.
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=P5551-ND
NightStalker62



Joined: 16 Sep 2010
Posts: 5

PostPosted: Thu Sep 16, 2010 9:39 pm    Post subject: Reply with quote

i'm assuming board location C427 will be marked for me to find it? will i just have to unsolder and solder a electrolytic capacitor? will i need a specific electrolytic capacitor or are they all the same? where will be able to find one? radio shack?
JTS1957



Joined: 21 Jan 2009
Posts: 2347
Location: Far, Far Away

PostPosted: Thu Sep 16, 2010 10:04 pm    Post subject: Reply with quote

Yes.
Yes, paying attention to polarity (will be clearly marked on cap & board - observe old one). Get desoldering braid http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=CW2-5-ND. Heat on lead one at a time rocking cap in opposite direction pulling lead through the board, repeat with other lead removing cap completely. Take desoldering braid and drag it on the two pads while heating braid with iron. Be careful not to create any solder bridges.
Click on link above for where to obtain replacement for the one I mentioned. I haven't bought replacement parts at Radio Shack in years. If you have a Fry's however they should have a suitable replacement. This is the most common capacitor I've seen cause your symptom.
NightStalker62



Joined: 16 Sep 2010
Posts: 5

PostPosted: Sat Sep 18, 2010 12:47 am    Post subject: Reply with quote

this all sounds really complicated. i think i would just ruin the tv. does anyone know how much this would cost if i got someone to repair it for me?
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JTS1957



Joined: 21 Jan 2009
Posts: 2347
Location: Far, Far Away

PostPosted: Sat Sep 18, 2010 1:15 am    Post subject: Reply with quote

Visit YouTube. Search for desoldering using braid or wick.

http://www.youtube.com/watch?v=AcbezX8TrOU
NightStalker62



Joined: 16 Sep 2010
Posts: 5

PostPosted: Sat Sep 18, 2010 7:16 am    Post subject: Reply with quote

is there any way to find out what kind i need before i open up the tv?

should i believe this website?
http://www.partstore.com/Part/Toshiba/Toshiba/MW24FP1/Toshiba/Toshiba/72794380/New.aspx

if that's right i guess this would be the one i would need?
http://www.radioshack.com/product/index.jsp?productId=2102510&filterName=Type&filterValue=Electrolytic+capacitors
JTS1957



Joined: 21 Jan 2009
Posts: 2347
Location: Far, Far Away

PostPosted: Sat Sep 18, 2010 11:42 am    Post subject: Reply with quote

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=P5551-ND
$0.30 (plus s&h) 105C
http://www.partstore.com/Part/Toshiba/Toshiba/MW24FP1/Toshiba/Toshiba/72794380/New.aspx
$3.29 (plus s&h) unknown temp rating
http://www.radioshack.com/product/index.jsp?productId=2102510&filterName=Type&filterValue=Electrolytic+capacitors
$1.29 (no s&h) 85C

Equal or better. ANY of them WILL work.
NightStalker62



Joined: 16 Sep 2010
Posts: 5

PostPosted: Mon Sep 20, 2010 8:56 am    Post subject: Reply with quote

ok, i opened it up and unsoldered it and it says 1uf 250v on it so i went to radioshack and this is the only one i saw:

http://www.radioshack.com/product/index.jsp?productId=2102515

i don't even know if it's an electrolytic capacitor. also, the one i took off doesn't look anything like that one. it looks like a cylinder.



EDIT: ok, i think i did everything right but i did screw up at first. the first capacitor i desoldered was the wrong one. it wasn't anywhere near the circuit board i was supposed to find the right one. i found the right capacitor and desoldered it and soldered the new one on and then soldered the first capacitor that i shouldn't have touched. all that soldering i did in electronics class in high school paid off. the funny thing was i saw a spark when i desoldered the first capacitor and i heard a shock when i was on the circuit board looking for the right one. i thought i ruined the tv but low and behold when i plugged it in and hit the power button it turned on and it looks like the white lines are gone.

thank you so much for your help JTS1957. i appreciate it greatly. i thought i would just have to wait a couple of months to get a new tv but now that i've fixed it i may hold onto it longer.
JTS1957



Joined: 21 Jan 2009
Posts: 2347
Location: Far, Far Away

PostPosted: Mon Sep 20, 2010 10:36 am    Post subject: Reply with quote

Glad you found right one and you're welcome.
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