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April 26th, 2021 09:00
XPS 8920 Power Supply Problem
My XPS 8920 will not turn on. If I hold my finger on the power supply button next to the green LED, the power supply will start, but when I remove my finger, it stops. Will not start again unless I remove and replace the power cord.
Does this indicate a problem with the power supply, or something else?
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speedstep
11 Legend
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47K Posts
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April 26th, 2021 09:00
8920 uses standard EPS12v power supply. So EVGA 700BR is a working known replacement. Could be as simple as needing new CMOS battery or as bad as needing new power supply.
Duracell DL2032 batteries are not expensive I would start with that.
many grocery stores have these because blood sugar measurement devices use the same batteries.
https://www.amazon.com/Duracell-DL2032B2PK-Lithium-Medical-Battery/dp/B002YEE0P6
https://www.evga.com/products/product.aspx?pn=100-BR-0700-K1
https://www.bestbuy.com/site/evga-br-series-700w-atx12v-eps12v-80-plus-power-supply-dc-dc-technology-black/6346160.p?skuId=6346160
fireberd
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April 26th, 2021 09:00
In many cases having to remove the AC power cord is an indication the "crowbar" circuit (electronic circuit breaker) has tripped. If the "crowbar" circuit activates (trips) removing the input AC power is required to reset it. Could be a bad power supply or something in the PC is overloading the power supply causing the "crowbar" to trip.
There are power supply testers but they only show the various voltages and do not test the power supply under load. Thus the only sure way to "test" a power supply is to use a known good power supply.
WingLeader
11 Posts
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April 28th, 2021 15:00
I replaced the power supply, and the computer runs, but no output to monitor. I get a CMOS battery failure with 5 blinks of the power switch LED. I have tried replacing the battery, but no help. I have tried two batteries. Both read 3.1 volts on a Fluke 87.
RoHe
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April 28th, 2021 17:00
@WingLeader - Try clearing BIOS to see if you can clear battery error:
As for the video issue...Does this PC have an add-in video card or does it only have onboard Intel HD Graphics?
If you have an add-in video card, the monitor should be connected to the video card, not to either the onboard Intel HDMI or DisplayPort ports, because those onboard ports are probably disabled when an add-in video card is installed.