Idea with this would be that you could use this motherboard with an open air frame case and power button from Amazon, drop in one of the supported Ryzen CPUs ($10-$50) listed below, add an NVMe SSD, low power, budget GPU, and then a compatible HP PSU ($15-35) to get this board up and running.

The 2 pins furthest right are for the power button, the other 2 pins to the left are for power led. I've also tested the motherboards with a PSU from an HP EliteDesk and it works without issue. As long as the power supply uses dual 4 pins to the motherboard and not a 4 pin + 6 pin, the PSU should work.

The HP Pavilion 590-P series, specifically models like the 590-P0109, 590-P0201a, and 590-P0207A, are known to use the Sunflower motherboard if you are looking to replace the board on any of those specific models.

Supported Processors:

• AMD Ryzen 7 2700: 8 cores/16 threads, 3.2 GHz (up to 4.1 GHz).
• AMD Ryzen 5 2600: 6 cores/12 threads.
• AMD Ryzen 7 1700: 8 cores/16 threads, 3.0 GHz.
• AMD Ryzen 5 1600: 6 cores/12 threads, 3.2 GHz.
• AMD Ryzen 5 2400G: 4 cores/8 threads, 3.6 GHz.
• AMD Ryzen 3 2200G: 4 cores/4 threads, 3.5 GHz.
• AMD A12-9800 APU: 4 cores, 3.8 GHz.
• AMD A10-9700 APU: 4 cores, 3.5 GHz.
• AMD A8-9600 APU: 4 cores, 3.1 GHz

Recommended GPUs:

• Rx 460/560 (180W PSU)
• Rx 470/570 (240W PSU)
• RTX 3050 6GB (180W PSU)
• GTX 1660/Super/Ti (300W+ PSU)
• RTX 3050 8GB (240W PSU)
• Rx 6600 (300W+ PSU)
• RTX 4060 (300W+ PSU)