I need to replace the power supply in an Inspiron 3650. The part number on the dead PSU is L240NM-00, will this power supply act as a drop-in replacement?

I have no idea. They sent me a part that looked similar but was the incorrect part, then claimed I took too long to notify them and ghosted me. I'll never order from them again.

GIGABYTE B650M GAMING PLUS WIFI AM5 LGA 1718 AMD B650 M-ATX, DDR5, PCIe 4.0 M.2, PCIe 4.0, USB 3.2 Gen 1 Type-C, Wi-Fi 6E, 2.5GbE LAN

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Main image of Dell Optiplex 3040 5040 7040 Inspiron 3650 3656 Precision 3420 Computer Power Supply - 240W Version

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Dell Optiplex 3040 5040 7040 Inspiron 3650 3656 Precision 3420 Computer Power Supply - 240W Version

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Proprietary Power Supply

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Description: New Dell computer 240 watt power supply. This part has a 12V 8-pin and a 4V 4-pin connector. **Some of the models listed below may have come with a different watt power supply. Please check the part # and the watts on your existing power supply to make sure that you are ordering the correct one. This item was pulled from a new computer or is old stock.

Compatible Part #'s: 0706M, 2P1RD, W72XN, 4GTN5, H62JR, H240AM-02, D240A007L, AC240NM-00, AC240EM-00

Compatible Models:

Dell Optiplex 3040, 5040, 7040

Dell Inspiron 3650, 3656

Dell Precision 3420

General
Brand	DELL

Details
Type	Proprietary Power Supply

Additional Information
First Listed on Newegg	April 28, 2026

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Return for refund within: 30 days
Return for replacement within: 90 days
This item is covered by The Best Part, Inc. Return Policy

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Item#: 9SIC6J1KVW8721