Ethernet no link detection

Dear all I have build my own custome board using STM32F407IGT6 device and used ST802RT1A as the PHY, when I start debugging and I break at main,my PC recognize the Ethernet link, but when I start the...
No st-link detected

When I tired to download the program the flash, I get the error "No st-link detected". I get the same error when I try to connect with STM32 ST-LINK Utility.Do I have a hardware problem or a driver problem...
No ST-Link detected

i am using STM32f205vg board for my work.when i try to debug the code with the board connected it shows the message NO ST-LINNK DETECTED. in the debug setting i have selected St-link debugger and also...
No st-link detected

When I tired to download the program the flash, I get the error "No st-link detected". I get the same error when I try to connect with STM32 ST-LINK Utility.Do I have a hardware problem or a driver problem...
No ST-Link detected

i am using STM32f205vg board for my work.when i try to debug the code with the board connected it shows the message NO ST-LINNK DETECTED. in the debug setting i have selected St-link debugger and also...