My suggestion is to try another graphics card or to try your Cube's in another Mac. You can get another Rage Pro on eBay for $30. On Nov 19, 2003, at 8:16 AM, Martin Weiss wrote: >> My Cube (with a Sonnet upgrade 1.2 Ghz up grade processor card) does >> not engage the monitor any longer. Apple Knowledge base suggests >> testing it on a known good monitor (which I've done and it still does >> not work) , checking the power connection to the card (all seem OK). > > The monitors I've checked have both vga and adc connectors. When I > turn the Cube on the indicator light on the Cube flashes and goes off > immediately. >> >> Is there anything else I should look into? It is a ATI Rage with a >> heat sink, no fan. >> >> What is available as replacement that doesn't require alteration of >> the Cube, searching the Earth, paying a fortune and needs a fan. >>