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Pete, Electronic Engineer
Category: TV
Satisfied Customers: 17687
Experience:  Over 16 years of experience installing and repairing electronics.
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My 50" Samsung plasma has a blacked out screen but still has

Customer Question

My 50" Samsung plasma has a blacked out screen but still has sound. Model: S50HW-YB02. I think it could possibly be a blown capacitor, located left of the F5700 fuse.
JA: How long has this been going on?
Customer: Just happened this morning.
JA: What troubleshooting have you tried?
Customer: Turning it on and off. Trying to access the tv menu. Reset the cable box.
JA: What is the exact make and model of your tv? And how long has this been an issue?
Customer: Samsung 50" plasma...Model: S50HW-YB02. It just happened 12 hours ago.
JA: The TV expert can solve this for you. Anything else you want him to know before I connect you two?
Customer: No
Submitted: 1 year ago.
Category: TV
Expert:  Pete replied 1 year ago.


If the capacitor is suspect, go ahead and replace it.

Let me know if that fixes the problem?

Kindly rate my service 5 stars at the top of your question page if my answer worked so I am rewarded for my time; otherwise please reply back if you need further assistance.

Customer: replied 1 year ago.
I replaced both bulged capacitors. The tv still turned on with a black screen, but now there are about 100 red, green and blue pixels appearing. Not sure if this has anything to do with it, but one of the chips on the Y buffer board had an orange light that was lit.
Expert:  Pete replied 1 year ago.

The colored pixels (known as "sparkling") can occur if the voltage is not correct.

Did you use exact replacement capacitors?

Try adjusting the VSCAN voltage setting and let me know if that helps?

Customer: replied 1 year ago.
How do I adjust the VSCAN voltage?
Expert:  Pete replied 1 year ago.

There will be adjustable pots on the board which you can adjust, similar to this one:

Customer: replied 1 year ago.
The voltage of the capacitors is the exact same as the old one though.
Expert:  Pete replied 1 year ago.

The tolerances will vary; no two capacitors will be the same.

Expert:  Pete replied 1 year ago.

That is why the adjustable pots are present in the circuit.

Customer: replied 1 year ago.
I've tried to adjust the pots and nothing. There are no more little dots...just black now. I replaced the YBuffer boards as well.
Customer: replied 1 year ago.
Sometimes a scratchy white line or a shot of scratchy white light will appear when I turn it on...but no picture.
Expert:  Pete replied 1 year ago.

Ok, then something else is amiss.

Have you double-checked all connections?

Customer: replied 1 year ago.
Double checked and triple checked.
Expert:  Pete replied 1 year ago.

Ok, let me check if the other techs have any ideas on this...