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Semp Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
STI SEMP LE3256
Green sadbay led comes on and goes off every time the TV turns on main board light comes onThe defect is the faulty memory, this TV has a lot of memory defect, just replace it and it works
SEMP TOSHIBALC4246W
The 12v power supply was intermittent causing the backlight to become unstable (screen flashing)I reviewed the electrolytic capacitors that are around the nb901 oscillator ci and found the cap. cb906 with altered capacitance and esrAfter replacing the capacitor, the 12v voltage stabilized and the backlight stopped flashing and turning off.Alegrete
SEMPLC4241W
Does not turn on or stand byElectrical discharge from the hdmi inputHdmi ci replacementRafael
SEMPDL4077
Stuck in the forever logoSoftwareFor serial with start 925020 - https://onedrive.live.com/?authkey=%21aipyplns2thlmv4&id=8b5d8d4aa14e93a7%211003&cid=8b5d8d4aa14e93a7&parid=root&parqt=sharedby&parcid=unauth&o=oneup you have to plug it in by holding the menu button (it's a square ) until the stby starts flashing green and red, then just wait.Jailon
SEMP TCL L43S3900FS
TV does not turn on LED ST BY blinking quickly, 12V power supply with only 6V.Capacitors in the power supply primary: cw922 10uf /50v and cw920 22uf/50v, replace directly.EugĂȘnio
SEMP32L2400
TV turns on and after 1 or 2 minutes it turns off and when turned on it shows the same faultN805 and n807 3v3 regulators faulty, just change and everything is fine.ALBERI F S
SEMP TCL32S OU OUTROS MODELOS!
Blurred or inverted image after changing the cardHome key+062598+key with the three lines+ID of the original board, do this quickly and wait for it to restartRodrigo cofferiRodrigo cofferi
SEMP-TOSHIBA1482
U8
Vertical closedQ421 and q830 brokenReplace without measuring, if you can't find an original replacement, you can use the d1266 which works fine.Tiago C. Neves
SEMPTV2083
U9
B+ with 130 on and off, in 1 second. After changing q501, vertically closed, it was the c301.Processor q501, tb1238n, shorted,Macajuba
SEMP TOSHIBATVC-100
Fully closed verticalR316 of 10r toast and d306 with leak, almost shortedReplacing these 2 on the TV solved the problemRgs011
SEMPLC4046
No image appears, just the stand by LED lights upLarge electrolytic capacitor from the power supply fully open, just change it and it workedreginaldo moronte,eletronica junior caldas novas
SEMPL43S4900FS
Backlight turns off after a while only when using applications, on channel backlight does not turn offDefective backlight, but the explanation I found is from YouTube, credits to the friend at the link belowHttps://www.youtube.com/watch?v=i2x0vswl1csMIGUELTV
SEMP LC3245W
Does not turn on or stand by / 5v giving 1 and a littleCB956 ceramic capacitor with leak (next to photocoupler)Replace without measuringAndre Vargas
SEMP TOSHIBA1021
Fully enclosed vertical, with soundC317 (1uf 50v) altered/leaked.Replace the same. the c303 can also cause vertical problems. It is recommended to replace both.Rgs011
SEMP1490
U14
TV on standby voltages ok, b+ at 77 v, it only turns on if you remove the q432, without it it won't turn off on the controlCapacitor c887 of 100mf for 35v, change without measuringDTEC_ELETRONICA
SEMP2177
SL11
Hitting weak relay and high power supply.R878 amended.Romar
SEMP40L2500
The red LED comes out but does not turn on, 5v oscillating, replace the bloated capacitor and the n807If when you press power the 5v on the n807 drops and keeps oscillating, replace the n807Rodrigo cofferiRodrigo cofferi
SEMP TV2934
SK-91
Turns on image shakes turns off, turns on again and turns off repeating thisPolyeste capacitor next to the burnt strI just replaced it and the TV looked great God bless you all alwaysRogério TV
SEMP TOSHIBALE3974
Standby LED flashing alternating green and red.Diodo dp9Evandro Estrela
SEMPLC3255
Sem audio, ivideo normalNo mute voltage on audio ci n202 r2a15120Make a jumper between pins 2 and 3 of the ci, raising the mute levelLOOPTEL