Have TV Questions? Ask a TV Technician
Hi and welcome to justanswer.
From your description it does sound like your power supply circuit is defective and in your case weak capacitors could be the cause.
That board could be repaired or replaced
If you`d like to work on this yourself i could upload pictures to identify that board and the components that are the most likely to have failed.
I will wait for a while(standby) to see if you become available for chat, just send me a reply ,and i will be notified and be with you ASAP.
Yes please upload or send in e-mail to me. I'm available mementarily, but must leave shortly, and can continue later this evening.
Hello, i was just about to go out myself so you could get back to me later and in the mean time i will upload the infos ?
Talk to you later.
By the way your model number is XXXXX not PF52I
Here is a picture of your power supply board, you will see that i circled and pointed to some capacitors.I`d like you to look at them closely and tell me if some of them(or all of them) appear to have slightly bulging/rounded tops.Their tops should be perfectly flat.
Jack, I'm back...
Did you look at that picture ?
Printing it out, yes. Model # XXXXX XXXXX
Do you have the back cover off the tv ?
NO TV WEIGHS 78 LBS. I WEIGH 105...WILL HAVE TO WAIT FOR HELP, THIS WEEKEND. It's hanging on the wall.
O.k no problem,
In any case that circuit is the one that i suspect and it can be repaired or replaced
does a strip across the bottom on the back come off?
You will have to take off pretty much every screws in sight
I have the parts list from Magnavox. they are all Phillips parts.
Yes same company and i will give you all the part numbers you will need anyway
So if you get a chance to look at those capacitors this weekend then just message me
823827736059 capacitor and 823827735013 capacitor are listed. I will. thanks. are they soldered in?
Yes they are but we`ll start with a visual inspection
ok, talk to you then.
o.k then Connie ,good night
Jack, I'm here. Visual shows single capacitor ok/flat but group of three all have slight bulge or rounding of the top, convex? Three are #2079, 2081, 2082. Board has 7 other spots of varnish on back side....cleaned somewhat w/alcohol. Board #3138(NNN) NNN-NNNN Bar Code sticker # XXXXX 168 66991, top, and #PAP XXXXXXXXX on bottom of sticker.
At last check, last night, TV no longer turns on. Tries but no cigar even after trying for hours. Interestingly enough does not shut off either w/remote or power button. Had to unplug power cord.
I'll wait awhile and hope you come online...:-)
Getting a coffee. Still here.
How much to repair & how much does the board cost to replace???
Just checking in.
Sorry I missed you.
I wish this sys would beep me when you came on. You have my tele if I'm checking mail,etc.
TV is open, apart & on the carpet!
Leaving your window open on desktop.
This is chat tag. If you do check in again; any answers? I know it's Sunday but I'll wait awhile
Don't want to miss you if you check in.
received text mssg from yesterday
Missed you at 6:18-6:19 by 6 minutes. Just writing to let you know I'm here.
your pic says intializing but I think it's stuck.
just reading what you wrote
O.k first ,don`t worry about the varnish, it`s normalCan you give me the value of those caps ?I.E 1000mfd(uf) 10 volts , 470mfd@25V etc ?
These are generic parts ,so you don`t need the manual or the company part numbers.
that must be 25 volts ?
will look again
or 35 volts
the 3 of them ?
can only read 2, but yes.
O.k then these values are not standard but they can be replaced by the better and more standard valur of 2200uf /35 volts that you can find in any repair shop or even radio shack
If you want to make a test tonight then get a hair dryer and heat them up for 3 to 4 minutes and try the tv again
If they are not too far gone ,your tv should start up
ok, read all three/seperated capzon 1500uF 35v
O.k that sounds good,how about the 4th one that looks good ?
I was thinking that while you are there you just as well should replace them all,they will cost about $10 altogether !
sounds good. What about the cost of the board?
If you`re not equipped to replace them then you could take the board to a repair shop and ask them to replace them, it should take them 10 minutes and perhaps cost you $30 parts included
can you hold a sec for ther price of the board ?
sounds great, any suggestions where to take them?
Any tv repair shop in your area
I think I can replace them,but will wait for cost of board & where.
The board itself cost around $100
Looking for some place who has it in stock
Do I get form Magnavox?
No that would be from electronic parts suppliers
This is your board number; 313815866991 , if you want to do your own shopping
This is a good supplier ;http://www.moduslinkptstvboards.com/313815866991-P3736.aspx
the board has one number different....313816866991
There are other ones but they want around $300 for it
Thats o.k it does happen that they update the versions but it is the same anyway in your case
ok,thank you Jack. I just ask for the 2200uF/35V and 25V on the capacitors?
Yes that would be it, but can you give me a minute again ?
O.k thanks ,was just looking to see if the board is the same and that looks good,
You could also try that test with the hair dryer
can i replace the 2200uF/25 w/2200uF/35 or is that not a good idea?
No thats even better and less complicated
the higher the value and voltage the better
Yes iwas thinking that too!
the only thing is that they grow up in size,so you cannot go too high or they won`t fit physically
ok. will measure twice! Looks like the repacement of the 2200uF/25 will be fine.
Yes i was talking something like 10,000uf for example :)
They will fit just fine up to 50 volts
Make sure to respect the polatities though !!
oh yes....will sign off for tonight. Thank you Jack. Will let you know of progress. Saw the warning arrows will not positions of leads.
Yes and they will be indicated on the board itself
In any case you will receive an email after this chat is closed and there will be a link to get back to me anytime if you have any questions.
must be getting tired. Will note positions of leads. Thank you very much for your time and consideration.
O.k then you`re welcome and you can close this chat from your end with the accept button if you are satisfied with my answer and have no other questions at this time.
will test & let you know of progress. Good night
O.k good night
Jack, the capacitors are in, all is back together and all is right with the world!!! It works and you are truly a gentleman and a scholar! THANK YOU SO MUCH FOR YOUR TIME AND CONSIDERATION !