Dilshan R Jayakody’s Web Log

A few months ago, our AMD Ryzen™ 5 computer started giving some startup issues. At first, this problem happened randomly, and then it started happening at every bootup. The symptom is that if the computer shuts down after a boot, it will not start on the next power cycle(s). If we turn it off for 30 or 45 minutes and then turn it on, it will start working without any problems. This problem did not occur on warm restarts. After changing power supply units, we realized that the problem was with the PSU. This suspicious unit is a Corsair VS550 PSU . Corsair VS550 PSU PCB. Based on the symptoms, we thought the problem was with a capacitor on the PSU board. We disassembled the PSU and checked all the electrolytic capacitors, but we could not find any faulty capacitor(s). To further investigate this issue, we connected the PS-ON terminal to the ground ( GND ) and started the PSU. During this test, we see that the PSU is performing well on this condition. As we examine further, we find t...

These days we are working with VIA Technologies PC-1 series mainboards and compared with standard main boards these boards have special features and advantages. Main advantage is, its lower price and low power consumption . Like most modern motherboards these boards also have built-in Sound cards, Network adapters, SATA Support and build-in Video interface. VIA PC-1 series is specially design for low power computing and users may be able to run this mainboard with 150W power supply. There are several PC-1 mainboards are available and we are mainly worked with following units, PC-1000 Mainboard Powered by VIA C3 – 800MHz microprocessor 100/133 MHz FSB DDR-I Memory up to 1GB. VGA up to 64MB 4 USB 2.0 ports 10/100 LAN interface 1 PCI Slot Realtek AC97 audio codec Mini ATX form factor (170mm x 170mm) Price : Rs. 5000.00 (Sri Lanka Rupees) PC-3500 Mainboard Powered by VIA C7-D – 1800MHz microprocessor 400/800 MHz FSB DDR-II Memory up to 2GB VGA up to 256MB 6 USB 2.0 ports 10/100 LAN inte...