Friday Q&A: Colour Woes

Q. I bought an HP1702 LCD monitor because I thought my non-Apple CRT monitor was about to pack up. The day after, a pal offered me a Power Mac G5 1.8GHz complete with 17-inch Studio display for £100. With a DVI-to-VGA adapter, I discovered I could run the two displays from the G5, which was brilliant when I used Photoshop. Now, however, the HP one is okay in Mirror Display mode but the screen is often pinkish or blue with varying degrees of dark. On an old PowerBook, the HP monitor works normally. I’ve tried zapping the PRAM and NVRAM but it doesn’t get better.
David Elder

A. Now, this is a different sort of display glitch. Uniform colour tints or gradient fill effects across the screen can occasionally be caused by monitor faults, but more usually it is interference on the VGA cable or a faulty cable connection. The fact it works fine on the PowerBook doesn’t narrow things down; it could still be interference between the monitors or a cable fault at the plug or socket end. Replace the VGA cable. If that doesn’t help, change the DVI adapter.

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This question originally appeared in issue 228 of MacFormat, the UK’s best selling Apple magazine.
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