PSU replacement

Hi,

I have a Lenovo computer that does not power on due to its power supply unit seems to be dead.

I have a few old Lenovo computers that have PSU working fine, but I am not sure if it is okay to replace the broken one with this used one from another PC?

This is the broken PSU

broken PSU

And this is the used PSU from another PC.

used PSU
I already ordered a new one PSU for the same model but it will take up to 5 working days and I want to get this sorted with the used one if it is possible because I have user who needs to use the computer asap
EducadAsked:
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Norm DickinsonGuruCommented:
It appears that your replacement is rated at 280 watts and the original is rated at 240 watts, so you should be ok. If you start to see errors like blue screens or restarts, it is not working - otherwise it should work fine. Make it a point not to attach many peripherals, especially things like portable external hard drives that run off the power from the computer, or phones that want to charge via usb, and you should be ok for a few days.
akbCommented:
The replacement one will be fine. It is rated higher than the dead one so it will be OK.
Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
The replacement PSU should work fine since the output is not less than 240 Watts.  If it was less than 240 Watts then it could have been an issue.
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Gary CaseRetiredCommented:
As noted, the spare unit you have is fine to replace the old one.

The key things that much match are:

(a)  the replacement must be rated for at least as much output as the one you're replacing => in this case, the replacement is rated at 280 watts, the broken one at 240 watts, so you're fine;

(b)  the individual power buses must be able to provide as much power as the original unit =>in this case the 5v and 12v buses are the same for both units;  the 3.3v output is higher on the replacement, so again your fine;  and

(c)  you must have the appropriate connectors -- i.e. the ATX connection and the auxiliary power connector, plus whatever peripheral connections (SATA, Molex) that you need.   Your pictures don't show that, but it's almost certain that's the case ... and it's easy to visually confirm.

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nobusCommented:
note that PSU's from that period often had bad capacitors
so the "new " one can have them too
but nothing witholds you from trying
JustInCaseCommented:
Power is OK, but if dimensions here are true (from pictures looks like they are)
DPS-280HB
9.50 x 12.00 x 4.00  in
HK340-71FP
8.00 x 8.00 x 6.00 in
If the first PSU is intended to replace the second one - most likely will not fit in PC case.
Gary CaseRetiredCommented:
Indeed if these are not standard ATX power supplies, then the different dimensions will be an issue for mounting the supply in the case.    You can, however, still use the second unit until the new unit you've ordered comes in, as long as you can position it where the cables will work for your system.
JustInCaseCommented:
Yes, (aside that screw holes on PSUs are not in the same place), but PSUs usually have two functions, to provide power, and to remove heat from PS case, and if power supply is not positioned where it supposed to be, system may overheat and shut for not having enough air flow through PC case. The best way to destroy capacitors on motherboard and PSU is not provide enough cold air flow through PC case (keep it in a small warm place).
nobusCommented:
i take it he sees the difference in size...
EducadAuthor Commented:
Great explanations! Thank you so much!
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