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SEMP Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SEMPTV 2134(C)SL
Image comes on, then turns off, it oscillates but without image +b lowC613 102k power supply primariaReplace without measuringGILBERTO COSTA
SEMPDL4845
TV doesn't turn on, stays on stand by.SuddenlyReplace the position of the socket wire (rotate it, from left to right or from top to bottom). Mine has been no problem for two weeks now. It worked for me.adriano
SEMPTV205MAV
White stripes at the top of the screenVertical circuit malfunction caused by electrolytic capacitor c308 (100uf/35v)Replace the c308 (100μF/35v) with one with the same capacitance value and insulation voltage!lucas
SEMP TOSHIBALC4046FDA
Turns on and the screen goes dark with no sound as if it wasn't turned onBad main boardReplace main boardGabriel
SEMPTV2134CSL
Does not turn on, LED blinks36k precision resistor, close to strw. at the power supplyDJ PITUKA
SEMP TOSHIGADL3245(A)
Doesn't start. device struck by lightning.Short in the VDW963 double diode (large diode next to the main power supply capacitor).Eletrônica R-Tec
SEMPTV1451NAV
U18
White stripes at the top of the screenProblem is caused by malfunction of the vertical circuitCheck capacitors around the stv9302b vertical IC.lucas
SEMP TOSHIBADL3975I(A)
The screen doesn't light upDP15 smd diode near the LED power connector shortedI placed 02 sr5100 diodes in parallel in the dp15 positionEletronica Cecé- Brumadinho MG
SEMPTV2050MAV
U17
Vertical closed or turns on without image and then turns offIntegrated circuit responsible for the faulty verticalReplace the ic stv9302a for another equal or equivalent one, in my case I removed the ic stv9325 from the tube monitor board, and the TV worked perfectly again!Lucas
SEMP2934(B) SL
SK91
Changed power supply, which was supposed to be 133v, was now 151vR633 changedCST eletrônica Serrota Senador Sá Ce
SEMPTV1491KAV
U15
Poor linearity from half the screen upwards. narrow weave on the sides.After working hard on the vertical circuit, changing almost all the parts and re-soldering everything, I found a tip sound on the forum about a similar defect on the same model. I replaced the c884. With this, the TV worked perfectlyTécnico Rodrigues
SEMP2134(B)SL
Vertical closed with image only from the middle upwards, and with retraction lines.Capacitor c318 and c319 470nf/25v changed. also change c310 4.7nf/50vReplace c318 c319 e c310MARCONES DE ARARIPINA-PE
SEMP U18
Missing the redClearGabaglio
SEMP TOSHIBATV2999
Annoying noise at the power supplySwap c819 and c879Persio (TVCompany)
SEMP2934
Red with tracesIn some cases the screen capacitor on the tube plate (102k capacitor) can be replaced by a 104.Francisco
SEMPTV2934
SK-9
Does not connect noise at the power supply16 volt line diode d306 alteredD306 replacejean alves
SEMPTV2134CSL
Normal plot, sound, and change channels. with an unfocused screen that looks like a rainbow.Replace d305 ( fr104) and d306 ( ba158) measuring both were good.Ademit tc
SEMP 2052
U19
It turned on immediately, turned off, didn't turn on again, only after a long timeReplace of stv 9302aAfter replace problem solvedVITURINO
SEMPTV2134
Closing on the sides and turning it off and on by itself, when the sound increases the intensity increases.Damaged primary power supply capacitor c613 102 2kvAfter changing the duct ok.George Pontes
SEMP TOSHIBA40L2400
When turning on the green LED, the logo appears and the standby LED turns red without sound or image.Touched some black l leds. Even so, it continued to turn off, it was no longer the LEDs.I replaced the burnt LEDs and resoldered the 3.3v regulator, it was cold soldered, resolved friends.Marinho