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STM32F3210E-Eval not responding via JTAG

Question asked by michaels.tobias on May 2, 2012
Latest reply on May 3, 2012 by michaels.tobias
we are using three STM32F3210E-Eval for about 1 year now. Recently 2 of these boards stopped responding via JTAG. The JTAG interface used is a Segger J-Link Edu. Different J-Links on different PCs have not made a difference. The third board still works fine. The J-Link Commander from Segger gives the error message "TDO is constantly high". I have also tried lowering the JTAG frequency and using SWD instead. Nothing works.
Any suggestions?