X51 R?, on, off, on

Question

The pc turns on then off then on then off then on. This keeps repeating till I pull out the psu. Someone knows how I can fix this?

speedstep · Answer

@Wibi  Cmos Battery bad and power distribution board bad and power supply bad.

Prometheus_ · Answer

Same issue occurred with mine years ago. Here you go, found this:

https://www.dell.com/support/manuals/en-us/alienware-area51-r4/alienwarearea51r5_servicemanual/clearing-cmos-settings?guid=guid-b43d3ab9-33fc-484d-9f4a-f05d5d088935&lang=en-us

You’re going to have to do this step a lot unless you just change out the psu. The link is for a separate system but it’s basically the same steps. Use the link to help you pinpoint the diagram for the X51 R2.

speedstep · Answer

@Wibi  @Prometheus_  Rome Tech Alienware Andromeda CMOS Battery B09FTQ1H8N x51-r2_owners manual Dell Alienware X51 R2Regulatory Model D05SRegulatory Type D05S002

Wibi · Answer

Does it matter wich cmo's battery i buy?

Im from Belgium and they dont sell that one here :s

I found this do: https://www.amazon.de/-/nl/dp/B08QG6S8NV/ref=sr_1_1?__mk_nl_NL=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=10DZ425TEUK4Y&keywords=rome+tech+cmos+battery+for+dell+alienware+x51+r2&qid=1648307148&sprefix=rome+tech+cmos+bios+battery+for+dell+alienware+x51+r2%2Caps%2C211&sr=8-1

Wibi · Answer

Is this a frequent problem with Alienware x51 R pc's?

speedstep · Answer

@Wibi

@Prometheus_

Yes the yellow light of death is VERY Common.

https://www.youtube.com/watch?v=l4Ru0EYZpuE

Whatever you do LOOK CAREFULLY at the OLD battery as far as the connector.

If the new battery is NOT the same cut the wires off the old one and solder them to the new battery wires and cover with heat shrink or tape.

https://www.youtube.com/watch?v=5DdAZrTZjEM

Wibi · Answer

Thank you! im ordering a CMOS battery soonSo i will give a update ones it arrives!

speedstep · Answer

Either way do not throw away the old battery because you may need the connector and wires to make a compatible hack. Red wire goes to + and black wire goes to -

https://www.youtube.com/watch?v=OPJ4r-f5olU

Fix your X51

https://www.youtube.com/watch?v=ypNG8w6AmTk

Battery is not visible without removing motherboard

Wibi · Answer

Replaced the cmo's battery it sadly dident fix it

speedstep · Answer

wrong polarity on the battery or one or more bad ram sticks.

Alienware Desktops

X51 R?, on, off, on

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