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TV flicker with dual mode display

Posted on 2004-03-31
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Last Modified: 2008-01-09
I use celeron 800Mhz with Winxp. I recently purchased NVIDIA Geforrce2 MX/MX400 64 MB with TV out option 2 play movies on my BPL TV 21 INCH. when I display in dual mode. my tv flicker a lot. I tried all possible refresh rates. Could someone help me?
Regards
Nawab
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Question by:nawab092800
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by:Callandor
ID: 10724094
Make sure your output resolution is 800x600 or lower, and that the format matches your TV (NTSC or PAL).
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by:nawab092800
ID: 10724269
The resolution is 800*600.Lower than this is not possible for this card.Tried for NTSC and PAL.No improvement.
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Expert Comment

by:Callandor
ID: 10724392
Do you know if your tv is capable of displaying an 800x600 image?  Most will do 640x480, but higher than that can be problematic.  Also, make try turning the tv on first before turning on the pc and see if that changes anything.
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by:nawab092800
ID: 10733593
In win98, I could get 640x480 resolution but still same flicker on TV
Thanks
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Expert Comment

by:Callandor
ID: 10734208
See if changing the refresh rate to a multiple of the format helps.  NTSC is 29.97fps, so 60Hz might work, and PAL is 25fps, so 75Hz might work for that.
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Author Comment

by:nawab092800
ID: 10747638
did not work with any refresh rates, I tried same card with another composite video scope at my office, it worked. What may be diff in my TV?
Nawab
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Expert Comment

by:Callandor
ID: 10748589
Do you have a manual for the TV that describes what kind of input it will take?  How old is this TV?
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Author Comment

by:nawab092800
ID: 10750870
My TV is BPL FXR 21" Emperor CTV 8yrs old with 70 channels. It has two Video IN(front & rear) 1v p-p, 75 ohms supports NTSC 4.43/3.58 and PAL. No refresh rate is mentoned.

Thanks
Nawab
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Accepted Solution

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Callandor earned 250 total points
ID: 10753156
At 8yrs old, you may be experiencing a problem with the circuitry on the inputs.  A flickering is an indication of marginal or failing performance, and the fact that the card works on a different video scope points to the tv as the point of failure.  TVs are not expected to run trouble-free for many years, especially if they are used a lot.
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