Discharge a capacitor

no!
CDI MODULES (IGNITORS)
What is a CDI module? A typical CDI module consists of a small transformer, a charging circuit, a triggering circuit and a main capacitor. First, the system voltage is raised up to 400-600 Volts by a transformer inside the CDI module. Then, the electric current flows to the charging circuit, charging a capacitor. A rectifier inside the charging circuit prevents the capacitor from discharging before the ignition point. When the triggering circuit receives triggering signal, the triggering circuit stops charging the circuit, allowing the capacitor to discharge rapidly to the low inductance ignition coil, which increases the 400-600 V capacitor discharge to up to 40 kV at the secondary winding. This 40 kV then jumps the spark plug gap. When there is no triggering signal, the charging circuit is reconnected and starts charging the capacitor again.

C7 and C15 capacitors bad, on main amp board, 470uf/25vdc, in +13vdc power supply circuit. BE SURE TO DISCHARGE MAIN LARGE CAPACITORS ON POWER SUPPLY BOARD AS THEY RUN AT + AND - 90VDC (180VDC TOTAL) AND STAY CHARGED LONG AFTER UNIT IS UNPLUGED!!! Shock hazard and may damage unit beyond repair if not discharged while desoldering components. Use around a 1000 ohm, 5 watt resistor across capacitor leads, if possible check voltage with meter to be sure they are discharged.

The capacitor is located to the right, remove top cover, follow the leads from the keypad to the circuit board, capacitor may be hidden under a flap of plastic, "silver in color and rectangular in shape, and a few inches long. Don't forget to unplug and discharge capacitor, "lethal voltages"

Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board

Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board

Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board

Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board.

Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board.

Bad or blown capacitors. Look on circuit board for domed, bulging or leaking capacitors. USE CAUTION!! high voltage capacitors can electrocute you. They should be properly discharged before working on circuit board.

After installing parts on a board some tv's require that you reset some values on the tv's servicing software. This software is only available to certified techs but you can search the net to try and find it. the caps that were replaced should be of exact value in 3 criteria:

1 Voltage
2 micro farads
3 temperature

Also a note of safety:

There are HIGH VOLTAGE circuits inside your tv that could inflict serious harm even when its unplugged if approached wrong. There should be warning stickers all over the chassis of the tv informing you of the danger that your exposed too. When you take out the primary power supply discharge all high voltage capacitors to cancel the harmful charge they are holding. Especially if you just turned the tv off.

Discharging HIGH VOLTAGE capacitors:
use a high wattage resistor of about 5 to 50 ohms/V of the working voltage of the capacitor. If you don't discharge the capacitors or replace caps with inaccurate values you could easily damage other sensitive circuits.

Try resetting the tv back to manufacturers specs and see if this produces better audio quality. And when ever your working on any circuit board be sure that you are well grounded. This will prevent ESD (electro static discharge) which can harm other circuits especially logic circuits. This will cause an imbalance in circuit operation and result in a non working tv eventually.