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Replacement PSU for Dell Studio 540 MT

I have a Dell Studio 540 MT that is about 3 years old - all original parts. This morning, I touched the power button to start up and nothing happened. At all. After searching around a bunch, it seems likely that it is a PSU issue. Seems to be a common occurrence with this computer.

Can someone suggest a good PSU to replace with? I work on this computer, so it gets 40-50 hours of use each week. No gaming. But lots videos, music, photos, browsing, VPN, and generally plenty of applications running at any given time.

I appreciate your help. Also, in case it's the mobo, can someone suggest one of those?
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More about replacement dell studio
  1. Are you using the motherboard's Integrated Intel GMA X4500HD graphics or are you using an Optional Discrete PCI Express x16 graphics card?

    If you're using an Optional Discrete PCI Express x16 graphics card please specify its make and model.

    The Dell Studio 540 MT uses a standard ATX PS2 form factor power supply unit.
  2. It's the integrated graphics card
  3. Best answer
    CORSAIR Builder Series CX430 V2 (CMPSU-430CXV2) 430W ATX12V v2.3 80 PLUS Certified Active PFC Power Supply for $44.99 ($24.99 after mail-in rebate card).

    Antec EarthWatts Green EA-380D Green 380W Continuous power ATX12V v2.3 / EPS12V 80 PLUS BRONZE Certified Active PFC Power Supply for $44.99.
  4. Best answer selected by rossco17.
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