Odd external display issue with streaming flash video

gdtrfb

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Hi everyone, this problem is vexing to say the least. Whenever I play a streaming flash video through my browser (FF) on my laptop's display, everything plays fine at full screen whether it's Hulu 360p, youtube 720p, etc., but when it's connected to my LCD TV via VGA, the video becomes choppy. 720p video from my hard drive play fine both on the internal and external displays. It only seems to be flash and only when connected to the TV that is a problem. Any help or suggestions would be greatly appreciated.

*Toshiba Satellite L455-S5009
*Windows 7 Home Premium (64-bit)
*Intel Pentium® Processor T4400
*4GB DDR3 memory
*Mobile Intel 4 Series Express Chipset Family (GMA 4500M)
*1366x768
*320GB HDD (5400rpm)

EDIT:
The laptop's display is set to 1366x768 (60) and the native resolution of the monitor is 1366x768 (60), but when they are connected, the maximum display setting allowed is 1360x768 (60). I don't know if that is relevant at all.
 
Last edited:

My Computer

Computer Manufacturer/Model Number
Toshiba Satellite L455-S5009
OS
Windows 7 Home Premium (64-bit)
CPU
Intel Pentium® Processor T4400
Memory
4GB DDR3 memory
Graphics Card(s)
Mobile Intel 4 Series Express Chipset Family (GMA 4500M)
Screen Resolution
1366x768
Hard Drives
320GB HDD (5400rpm)
What is your graphics card?
 

My Computer

Computer Manufacturer/Model Number
HP, Dell, Gateway, Toshiba - 4 laptops and 2 desktops
OS
Vista, Windows7, Mint Mate, Zorin, Windows 8
CPU
from 1.6GHz Duo to i7
Monitor(s) Displays
2x HP w2207
Hard Drives
5x HDD, 7x SSD, 12x Externals
Keyboard
with trackball - no mices
Mouse
Trackball mice
Internet Speed
DSL 6000
It's the onboard Intel. Would it be a graphics card issue if it plays correctly on the laptop's display?
 

My Computer

Computer Manufacturer/Model Number
Toshiba Satellite L455-S5009
OS
Windows 7 Home Premium (64-bit)
CPU
Intel Pentium® Processor T4400
Memory
4GB DDR3 memory
Graphics Card(s)
Mobile Intel 4 Series Express Chipset Family (GMA 4500M)
Screen Resolution
1366x768
Hard Drives
320GB HDD (5400rpm)
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