Will it fit in hp prodesk 400 g4 ?

No. This is an sfx unit for use in sfx,matx,or atx (with adapter). The hp uses a special small form factor slim power supply. Unless hp offers a higher wattage supply. You are out of luck.

Will it work / fit with https://www.amazon.com/gp/product/b077rpsmys/ref=oh_aui_search_detailpage?ie=utf8&psc=1

This power supply has following dimensions: 5 inches long 4 inches wide 2.5 inches high

I don't see a light indicator when it is plugged in, does it have one or you have to guess if it is working?

There is no light indicator for this power supply model. The way to tell if power supply is turned on is if the power supply fan spins or if your computer boots up after connecting all the cables correctly.

This is a question for the manufacturer, apevia. have you considered releasing a 500 watt sfx 80 plus bronze certified psu?

They make a 600W, that is barely more expensive than the 400W model

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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APEVIA SFX-AP400W Mini ITX Solution / Micro ATX / SFX 400W Power Supply | SFX Form Factor, 80mm Auto Thermal Fan, 400W SFX Power Supply, Sleeved PSU Cables, Heavy Duty Protections

Product ID: 37038669

Details

Brand
Apevia
Compatible Devices
Personal
Connector Type
floppy molex
Cooling Method
Air
Form Factor
Atx Micro Mini
Item Weight
921 g

⚡400W steady power output

🌀80mm auto thermal sensing fan

🔌Fully sleeved PSU cables

₹ 7744

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Description

⚡ Power your compact rig with silent strength and style!

BUILT IN SAFETY - Heavy duty protections ensure reliable, worry-free performance
COMPACT POWERHOUSE - 400W output tailored for Mini ITX & Micro ATX builds
WHISPER QUIET COOLING - 80mm auto thermal fan keeps temps low and noise minimal
SLEEK CABLE MANAGEMENT - All cables sleeved for durability and clean builds
VERSATILE CONNECTIVITY - Supports 20+4pin, PCIe, SATA, Molex & floppy connectors

The APEVIA SFX-AP400W is a 400W SFX form factor power supply designed for compact Mini ITX and Micro ATX systems. It features an 80mm automatic thermal sensing fan for quiet, efficient cooling, fully sleeved cables for neat builds, and a variety of connectors including 20+4pin, PCIe, SATA, Molex, and floppy. With heavy duty protections and a compact 125x100x63.5mm size, it delivers reliable power in a small footprint, perfect for modern small form factor PCs.

Specifications

ASIN	B01MEDG1PM
Best Sellers Rank	#196 in Computer Power Supplies
Brand	Apevia
Built-In Media	Power Supply
Compatible Devices	Personal Computer
Connector Type Used on Cable	floppy,molex,pcie,sata
Cooling Method	Air
Customer Reviews	3.9 3.9 out of 5 stars (516)
Fan Size	8 centimeters
Form Factor	Atx,Micro,Mini,Sfx
Global Trade Identification Number	00837344004872
Item Dimensions	5 x 4 x 2.5 inches
Item Type Name	Power Supply
Item Weight	921 g
Manufacturer	Apevia
Maximum Input Voltage	230 volts_of_alternating_current
Mfr Part Number	SFX-AP400W
Minimum Input Voltage	100 volts
Model Name	FBA_SFX-AP400WÂ
Model Number	SFX-AP400W
Number of Fans	1
Number of Items	1
Output Wattage	400 watts
Power Supply Design	Non-Modular
System Bus Connector Type	20+4 Pin
UPC	837344004872
Unit Count	1 Count
Warranty Description	1 Year
Wattage	400 watts

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