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I have a Dell 1626HT CRT Monitor (21&quot;) attached to a Dell GX400 tower running Windows 2000. &nbsp;I had shut the computer down for a few hours. &nbsp;When I turned it back on, the monitor display had a semi-hourglass shape (concave at the middle on both sides). &nbsp;Device manager tells me my video card (nVIDIA gFORCE2 GTS) and my monitor are working correctly. &nbsp;The Dell Diagnostic software did not find anything wrong with my display. &nbsp;Can anyone tell me what's causing this?
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I have a Dell 1626HT CRT Monitor (21") attached to a Dell GX400 tower running Windows 2000.  I had shut the computer down for a few hours.  When I turned it back on, the monitor display had a semi-hourglass shape (concave at the middle on both sides).  Device manager tells me my video card (nVIDIA gFORCE2 GTS) and my monitor are working correctly.  The Dell Diagnostic software did not find anything wrong with my display.  Can anyone tell me what's causing this?

How to Fix Concave (Hour Glass) Monitor Display

Components are those devices that are internal to a computer -- the PC boards, the central processor (CPU), the memory (RAM), disk and video controllers and so on.

Components

A monitor or a display is an electronic visual display for computers, usually comprised of the display device, circuitry, casing, and power supply. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors used a cathode ray tube (CRT) about as deep as the screen size. They are connected to the computer via VGA, DVI, DisplayPort, Thunderbolt, LVDS or other proprietary connectors and signals.