Hi all,

I have a problem with an HEX8A1 board.

I have two HEX8A1 boards. I have change the fans since it was way too noisy, and i use a 220/920 setting. The two boards are linked to a TPlink router with openwrt ("OpenWrt Barrier Breaker r40295", i think it is a 0.3.0) through an USB hub. All (tplink and boards, hub is not externally powered) are powered with the same Corsair CX760.

This was working like a charm for the last 6 months. But since two days now, one of the board is not hashing anymore.

Everything looks fine, the board is seen by cgminer, when i plug/unplug it i can see the board disappearing/reappearing, but the hashrate is always 0. The second board is working and hashing. The led are the same on the two boards.

I have tried to plug only one board, i have tried 210/860, i have change the usb port, i have plug the faultly board directly to the TPlink, i have reset settings to 260/1000, but nothing worked.

I don't think it is a overheat problem, cause the fans are identicall on the two boards, and with those fans and settings the boards seems cooler than with the noisy sunon and 260/1000 settings (i can put my finger on the it for more than 10s ). Moreover, i have a very very low error rate, and i did not change anything on the configuration for the last 6 months (and the room is at 18°).

Any idea ?
How can i see if it is a overheat problem ?