how to change signal timing monitor problem

February 13, 2013 at 11:59:41
Specs: Windows Vista
when surfing the Internet the screen goes black with a red box .within this red box the words
Signal Frequency is out of range
H:89.2 KHz
Please change signal timing
I then press the power button on my Dell Inspiron 530 where I then wait approx 35 seconds before I hear a beep noise then the start button begins to flash. I press the button and my screen comes to life with the message from my Internet provider that computer was in suspend mode please reconnect which I promptly do. the monitor is an old Medion MD7475AC type:EZL15P2

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February 13, 2013 at 16:14:49
Turn off the screen saver /power management for the monitor.

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