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rawbert0
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XPS 8900, power on problem, #6

Same problem, tried SSD without it making a difference for the boot process. Removed all non-essential hardware items (external usb, external audio, video card, DVD-drive, HDD), re-seated memory, dusted, and still could not get passed this issue without resetting CMOS (see below) or letting the power drain in the power supply. Also tried an alternate power-supply without any difference in result.

Resetting CMOS will also get the device to boot with the clock reset. Out of all the pieces involved in the power-on process (power button, power supply, motherboard, and CPU) the cheapest is the power button by far.

Link to power button part number and ebay item.

https://www.dell.com/community/XPS-Desktops/XPS-8900-On-Off-button-issue/m-p/6222320#M20339

Resetting CMOS

Page 104https://topics-cdn.dell.com/pdf/xps-8900-desktop_service-manual_en-us.pdf

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