B7 TV Repair: Common Faults and Solutions.
Search: B7
Results: 46
Results: 46
B7 Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| CENTURY | B7 | Device without picture with red LED on | Cold Solder Oscillator Crystal | Solve the same | Dylls-NET |
| TAICON | TAICON B75 | Original eeprom data taicon b75 motherboard | Original eeprom data taicon b75 motherboard | dados da eproom | neupsx4 |
| HISENSE | H43B7100 RSAG7.820.8752/ROH | Standby LED flashes but the TV does not start and goes to standby | When I press the power button it starts blinking normally and then gives 2 quick blinks and goes back to standby. | Defective backlight replace the complete bus | mario1970 |
| INTELBRáS | XNB720VA | Does not hold charge, falls and keeps beeping and turns off power | Resistor 100r position r1 | Ademar | |
| SAMSUNG | UN55B7000 | Stand-by LED flashing, but works normally | It was solved by changing the two sensor boards (touch and remote) | ||
| LG | 47LB7DF | Dark screen, no image, lamps do not light. | Check f700, open case possible q 706 and q707 shorted, usually cold solder causes them to burn | Replace f700, q706, q707 and check possible annealed welds. | Assolini BR |
| LG | 47LB7DF | Does not turn on, pfc circuit does not bend 400v. Vcc supply of cis u101 and u600 is low, causing the 400v not to double | Shorted components close to u501. | Replace of components: zd500 zenner 15v, smd transistor q501 "I took it from scrap from a similar PCI", cracked c509 smd. I didn't find the schematic for this power supply. | rafaelmoraes99 |
| LG | 42LB7DF | Does not tune dtv channels | Ripple in food | C817 replace | Marcos infotron-ltda |
| LG | 47LB7DF | Does not turn on nor does the LED light up | Primary power supply ok! the problem was the shorted pwm u502(ice3b1565j). r508(2r2) open and c202 and 206(2200uf/16v), stewed!. | Luir | |
| LG | 42LB7DF | Sometimes it turns on, often it doesn't, the LED blinks, activates the inverter but tsound is no image | C401 reset circuit open | Replace c401 10μF/16 v | Roney Nogueira |
| LG | 42LB7DF | Sometimes it turns on but the image stays dark | Power transistor 07n60c3 location q706 check q707 too | Swapping for a 12n50 power mosfet, solved the problem | CELSOKAYRAN |
| LG | 42LB7DF-SB LJ-81A | Takes time to call | Secondary power supply with puffed caps | Replace inflated caps on the secondary, c202, c217, c218, c226, c210 and c206, all 105 degrees | Romolo Filho |
| SAMSUNG | CCB7571 Monitor | No high voltage | C449 - 10µf / 35v | Bilico | |
| AOC | CMLB747 Monitor | Displacement h when cold. | C121 ? 10uf/250v. c12? 47uf/25v. c74? 1uf/250v. c62? 47uf/16v. look for cold welds. | Bilico | |
| AOC | CMLB746 Monitor | Video flashes in the red cannon. | Look for cold sodas. c706, c709 and c711? 1uf/160v. | Bilico | |
| LG | 47LB7DF | It takes a while to turn on, the LED just keeps blinking | C from power supply c202,217,210,221,200 | Bruske | |
| SONY | FH-B7CD | It doesn't close the drawer (it opens and then doesn't close) and it also doesn't read the CD | Check the limit switch on the optical unit, it is usually bent. | Straighten the key | johnny busnadiego |
| SONY | FH-B7CD | Weak or unlit display | Review power supply -24v or diode d 910 = 24v shorted | ramiresrc | |
| GOLDSTAR | CP14B70 | TV does not turn on fluctuations in power supply and low voltage | C 828 22/50v located at the power supply | ELETRONICA ROCHA | |
| LG | 700S -CB777G-NE | Nothing happens (has normal supply voltages) | C954 disabled | Replace the same with another (1000μF 10v) | cardosojp |