47LB7DF TV Repair: Common Faults and Solutions.
Search: 47LB7DF
Results: 5
Results: 5
47LB7DF Repair Guide: Common Issues and Fixes
| Brand | Model | Fault | Detailed Problem | Solution | By |
|---|---|---|---|---|---|
| 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 | 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 | 47LB7DF | It takes a while to turn on, the LED just keeps blinking | C from power supply c202,217,210,221,200 | Bruske | |
| LG | 47LB7DF | It takes a while to turn on, the LED just keeps blinking | C from power supply c202,217,210,221,200 | Bruske |