Samsung SyncMaster - Recent Questions, Troubleshooting & Support - Page 9

I had a similar problem with my LCD computer screen. I took it apart and noticed a capacitor that was raised up on the flat end and appeared to be leaking a substance. Replaced it with a similar capacitor and works fine, for three years now.

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Check signal cables means there's no signal on input. If your PC still shows up on a different monitor then it's a time to replace a mainboard in your monitor.