Checking for blown capacitors in your malfunctioning electronics is fast and easy if know what you're looking for. Replacing one part at a couple dollars a piece is much cheaper than replacing an entire monitor for hundreds of dollars! Monitors, digital converters, and other video- related electronics commonly have power issues that are caused by faulty (read: low quality production) capacitors. Common symptoms include:
- Unit won't turn on
- Unit won't return from standby
- Unit turns on and off intermittently
- Screen flickering or distorted
- Lines across the screen
If you're experiencing any of these, it's worth taking several minutes to check your circuit board capacitors.
Step 1: Tools Needed
Checking the capacitor just requires your eyeballs but replacing them requires a few tools:
- Screwdriver, hex wrench, or whatever's needed to open the case
- Soldering iron
- Replacement capacitors (you will find the values for this in the following steps)
Also optional but helpful is soldering wick, which is available for fairly cheap at Radio Shack.
In this example I'm repairing a digital TV converter box that will power on, but does not activate from standby.