symptoms were as such for this lcd tv ( Vestel Family) tv was working when turned on would stay on for 2 -3 hours shut off, cooled off then function again however after about 3 weeks it finally would not turn on as such it is totally dead no Led indicator lights whatsoever.
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Seiki LC40B56 totally dead
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Re: Seiki LC40B56 totally dead
Vestel? It's not built in Turkey, so probably not a Vestel.
And Seiki is a very Chinese company, based in Beijing, IIRC...
Only Europe gets Vestel, IIRC...ASRock B550 PG Velocita
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Re: Seiki LC40B56 totally dead
Not a Vestel UMC junker, also have you checked if the Tv is getting AC power normally the little rocker switches on these fail.Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
https://www.facebook.com/Telford-Tel...7894576335359/
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Re: Seiki LC40B56 totally dead
Sorry I was away due to family matters, I did take some numbers for electricity for the picture of
5v SB = 5v dc
PS = 5v dc
for the transistors on the hot bar ie (see picture number A) see the numbers on the heat sink ie 1,2,3,4 voltage values were between 69v to 71v. the large capacitor laying on the side was giving readings between 270 to OL and back again. The transistors on the cold side ( several not in view ) are 0 vts dc. I am getting 120vts ac coming it ie the blue and brown leads in the top corner
viz here for the items ie 5vSB and the PS
Any input would be helpful I would consider taking off all the transistors and capacitors if necessary to gain proper readings
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Re: Seiki LC40B56 totally dead
Hi. For a start you appear to have standby voltage so is the standby light on at front of set. The large capacitor on hot side voltage is measured from its pins neg to neg pos to pos and should be up around 370v. You need to ascertain if problem is in main or power board so see if you can force power board on when disconnected from main. But for a quick possible fix the two large caps cold side top of pic cheap to replace and try.
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Re: Seiki LC40B56 totally dead
sorry again But here is what i did put the red lead from multimeter on ground used the black lead on the different pins as in picture on bottom i dont know if this is correct but here it
5v pin = -5vts dc
next 5vt pin =-5vts dc
usb pin = -5vts dc
ps =-5vts dc
last 5vt pin =5vts dc
still no standby light though
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Re: Seiki LC40B56 totally dead
Ok your readings are confusing. Here's what we need. Voltages from connector that goes from power supply board to main board. Will need pin#- PIN DESCRIPTION -Pin voltage in standby-Pin voltage when pushing power button and picture of connector on power supply board.
Format:
Pin# - Pin Description - Pin Voltage standby - Pin voltage power on
1 - XXXXXXX - XXv - XXXv
2 - XXXXXXX - XXXv - XXXv
3 - XXXXXXX - XXXv - XXXv
4 - etc.
Black probe goes to ground for above tests. Main cap is measured in dcv across terminals of capI assume no responsibility for any stupid suggestions I might post.
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Re: Seiki LC40B56 totally dead
" flash eeprom has corrupted had this loads of times eeprom becomes faulty and drops boot loader this needs a reflash with correct software for screen as well has to be paired to eeprom" could you give me an idea how to repair the eepron in this case or should I buy a new one?
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