Re: Seiki SE50FY28 picture not displaying words properly! bad eeprom?
yes if i hit the input button the white lines for the no signal disappear but then i have the same lines where it would say hdmi etc in the upper left hand corner where it should say hdmi. so the panel is shot then? if so i guess i'll try and sell the boards!
philliesfan30m
Badcaps Veteran
Last Activity: 04-18-2018, 12:16 PM
Joined: 08-21-2013
Location: Northeast,Pennsylvania
-
Re: Seiki SE50FY28 picture not displaying words properly! bad eeprom?
here are some pictures of the control board that is attached to the lcd screen. the fuse on this board is where i was getting 11.5v. i also checked the big to-252 regulator it is a 1.2v 1a regulator markings are 912t45 0505 if i am correct thats what it is! the readings were 0 on tab and pin2 0 pin1 3.2v and pin3 1.2v so it seems to me it is putting out the proper voltage. datasheet says tab and pin 2 are ground and pin1 is vin and pin3 is vout. i don't know what else to check so if anyone can help i would appreciate...Leave a comment:
-
Seiki SE50FY28 picture not displaying words properly! bad eeprom?
I got this tv plugged it in and it powers up and checked a lot of the voltages and they all seem correct! But the screen is suppose to display no signal but it just has lines part way down the screen instead of saying no signal and the same happens when you try to change inputs it doesn't show the words just the lines that are representing the words! I'm guessing it is an eeprom problem but i'm not sure and need help figuring it out it doesn't have a separate t-con board where the cable from the mainboard plugs into the boards on the outside of the screen i checked the voltage on the fuse and... -
Re: Phillips 42PFL3704D/F7 No Standby Power
can you post a pic of all of the boards connectedLeave a comment:
-
Re: Phillips 42PFL3704D/F7 No Standby Power
high voltage there so be careful up to 400vdcLeave a comment:
-
Re: Phillips 42PFL3704D/F7 No Standby Power
are you checking that cap with the negative lead on the negative leg of the cap and the positive on the positive leg? when checking on hot side you have to use the negative leg of cap as ground not the chassis. you have to have some kind of voltage on the big cap or you wouldn't be getting any voltage at all.Leave a comment:
-
Re: RCA L32HD41 No power when inverter is connected fix
i replaced q106 + q107 and that got it to come back to life. Now i am gonna replace all 4 with the proper mosfets and replace those 2 caps like you suggested. Thanks again for the help i would still be troubleshooting the psu if you wouldn't of helped. And if anyone else has the same problem they now have a fix as well.
Leave a comment:
-
Re: RCA L32HD41 No power when inverter is connected
ok thanks for the info. when i get them off the board and test them i will use one or 2 of those as a test piece to see if i can get it working. will report back with findings. i just wanna say thanks because i have seen you have helped solve a lot of troubleshooting with people here me included and you are very patient with people that don't have the knowledge of electronics like you do!Leave a comment:
-
Re: RCA L32HD41 No power when inverter is connected
the mosfets on the board are could i replace them with these? they are both off inverter boards and seem to have the same or close to the same parameters and limits but i would like to know your opinion. if not i have other boards that i would rather salvage off rather than buy if i can.Leave a comment:
-
Re: RCA L32HD41 No power when inverter is connected
i will do that and report back when tested off the board and thanks so far for the info it is greatly appreciated!Leave a comment:
-
Re: RCA L32HD41 No power when inverter is connected
so you as saying remove all 4 and replace all 4 but when i remove them check them so i can find out which 1 or 2 or all are bad to use for someone else in case they run into the same problem? just for reference that board is a SSI320_4UA01 made by samsung which i saw was in a bunch of different brands and models.Leave a comment:
-
Re: RCA L32HD41 No power when inverter is connected
well the 2 caps show just continuity it should be higher than that. with the 2 leads together i get about 1.5 ohms and between the leads of the caps is about the same 1.6ohms. 2 mosfets read the same between s and d 1.5 ohms and the other 2 read 95 kohms and 117 kohms those readings are from closest to the connector to furthest away.Leave a comment:
-
Re: RCA L32HD41 No power when inverter is connected
pics of inverter board from left to right looking at is as if it was connected. those 2 different caps are like that on other boards as well. the board was never touched as far as i know....Leave a comment:
-
RCA L32HD41 No power when inverter is connected
The power supply chirps around the transformer when the inverter is plugged in and i get no power at all on the secondary side except a small amount of pulsing voltage that coincides with the chirping but with the inverter disconnected i get all the proper voltages on the secondary side and the tv powers on and off like it should. So i am thinking the power supply isn't driving the transformer properly when it has a load or a short but i checked the caps,diodes,resistors, etc. and i can't seem to find a faulty part or parts that is causing it to shut down when trying to power the inverter. i don't... -
Re: Help with Motor Control Board
yes that is the way they are connected.Last edited by philliesfan30m; 01-06-2015, 01:58 PM.Leave a comment:
-
Re: Help with Motor Control Board
yes that is correct solder them in the same way you have them lined up in pic 1 onto the board the same wayLeave a comment:
-
Re: Help with Motor Control Board
if both of those diodes read 0 both ways then they are both shorted. as toasty stated in post 13 you should check those 2 diodes dz1 and dz4 and budm stated in post 7. i'm not the best troubleshooter but i would bet those 2 diodes are part of the problem if not the complete problem just from looking at the burn marks on the board. you said they read 0. is that with the leads of the dmm reversed also? if so you would have to desolder a leg and retest to make sure. if they do read 0 both ways they are both shorted.Leave a comment:
-
Re: Question about t-con and mainboard?
anyone?Leave a comment:
-
Question about t-con and mainboard?
OK i am wondering if someone could tell me if the t-con or the mainboard actually tells the tv what size the panel is to display the proper viewing picture. i know you should replace with exact parts but i am wondering for experimental purposes. i know that the mainboard will have all the data for the tv's setting menus etc. and flash screen etc. but does it also tell the panel what size tv it is or does the t-con do that? i have already swapped a sceptre panel and t-con with ccfl into a rca led tv with a broken screen and everything worked perfect but they were both 32" tv's. Hopefully someone... -
Re: Sylvania LC320SS9 A has standby light, flashes green 12 times then back to standb
they are notorious for the inverter transformers going bad and those 4 diodes also going bad at the bottom of your second pic. and the wires going to the ccfl's touching each other and getting hot and shorting out but that doesn't seem to be your case when looking at the pics the don't seem to be touching. i would check the resistance of each of the inverter transformers and compare the readings with each other. and check those 4 diodes to see what they read.Leave a comment:
No activity results to display
Leave a comment: