The board requires at least 500 mA without using the usb ports built in (2000 mA with 3x500 mA devices connected) I am using a usb adapter directly, not a usb port from a computer to energize the board. I found this component: AP4435GM datasheet(1/5 Pages) A-POWER | P-CHANNEL ENHANCEMENT MODE POWER MOSFET tracing the power input, can this power mosfet be the guilty? So technically, if the usb built in 5V switch is dead I can replace it but I have very little knowledge over electronics. One of my questions if someone knows how the usb works, is about: USB ports are powered all the time? can I for example use an external powersource wired to the VCC and GND of the dead usb in the board or there is some kind of relation between usb power and data?įor example I can see a small relation but only for over current signal in an ideal layout exposed here: If something is wrong with a smd piece I think I can replace it (for example a smd power mosfet) I have replaced some smd components in old arduinos (ftdi) and servos but I really don't have idea on what's failing. The frontal and the back one produces the pc to freeze sometimes now (I think the failure is expanding now), right now, the sd card with XP was corrupted due the freezes (the registry was corrupted). Yes Mike, everything works but the left usb port. Storage: 1x SD Slot (Supports SDHC up to 32GB) USB: 3 ports (2 at the front, 1 at the rear)Īudio: RDC Semiconductor R3010 High Definition Audio VGA Integrated Graphics Chip: RDC Semiconductor M2010 (D-Sub 15-pin)Įthernet 10/100 Mbps LAN: RDC Semiconductor R6040 (RJ-45 connector) I discovered that the nearby usb DOES provide power but the board itself reboots if I use that port for a while for example with a usb keyboard.ĬPU: DM&P Vortex86MX (PMX-1000) is Pentium I MMX compatible - will run i586 instructions but not i686] I wish to know if someone knows anything I can do to debug this problem or has any experience (what can be damaged?) I have a programmable board with 4 usb host connectors, 3 visible and 2 usb hubs/2 port each (you can enable 1&2 and/or 3&4).ġ port is not providing any energy, as far I can see, there is 1 capacitor and 2 other nearby components used in every usb port.
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December 2022
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