Acer AL1717 power supply failure

Acer AL1717 power supply

Acer AL1717, manufactured in November 2005, model no. ET.1717P.014

The 17″ Acer list on this blog is nearing completion, with the AL1711, AL1716 and now AL1717 down!

The monitor would squeal and flash its power LED, occasionally flashing the backlight for a second or two.

All the larger electrolytic capacitors on the secondary side of the power supply tested bad. The big 2200µF/10V capacitor sits on a well-regulated 5V rail, and was replaced by a used 2200µF/6,3V Rubycon MBZ. The 1000µF/25V capacitors were replaced by various 1000µF/16V units. However, since the 12V rail they’re situated on seems to be poorly regulated and lying at almost 15V unloaded, replacing them with 25V caps is advisable. If the 220µF capacitor above the heatsink is not replaced, the screen will run noisily. Replacing it by a 470µF or 1000µF part will considerably lower the noise emitted by the screen still.

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