I'm having trouble with temperature 511 error. It happened randomly and miner hang without reboot. Please help!

19:06:05:050 1b84 new buf size: 0
19:06:07:752 1af4 GPU 1: got incorrect temperature 511, ignore
19:06:07:843 1af4 GPU 2: got incorrect temperature 511, ignore
19:06:11:470 1af4 GPU 1: got incorrect temperature 511, ignore
19:06:11:562 1af4 GPU 2: got incorrect temperature 511, ignore
19:06:14:926 1b84 got 248 bytes
19:06:14:926 1b84 buf: {"id":0,"jsonrpc":"2.0","result":["0xdcb409175e4740a26434b7089a94ad3e37ce77a55858062583924b2c82cd128f","0xec6e8e0d8056cf9eb61046eaeb754b8e71f48e10a86c61f4d287b4ac5244653f","0x0112e0be826d694b2e62d01511f12a6061fbaec8bc02357593e70e52ba","0x4adfaa"]}
19:06:14:926 1b84 parse packet: 247
19:06:14:926 1b84 ETH: job changed
19:06:14:926 1b84 new buf size: 0
19:06:14:926 1b84 ETH: 01/14/18-19:06:14 - New job from asia1.ethermine.org:4444
19:06:14:926 1b84 target: 0x0000000112e0be82 (diff: 4000MH), epoch 163(2.27GB)
19:06:14:926 1b84 ETH - Total Speed: 127.854 Mh/s, Total Shares: 3019, Rejected: 0, Time: 17:52
19:06:14:926 1b84 ETH: GPU1 0.000 Mh/s, GPU2 0.000 Mh/s, GPU3 31.959 Mh/s, GPU4 31.968 Mh/s, GPU5 31.962 Mh/s, GPU6 31.964 Mh/s
19:06:15:019 1b84 ETH: checking pool connection...
19:06:15:019 1b84 send: {"worker": "", "jsonrpc": "2.0", "params": [], "id": 3, "method": "eth_getWork"}
19:06:15:066 1b84 got 248 bytes
19:06:15:066 1b84 buf: {"id":3,"jsonrpc":"2.0","result":["0xdcb409175e4740a26434b7089a94ad3e37ce77a55858062583924b2c82cd128f","0xec6e8e0d8056cf9eb61046eaeb754b8e71f48e10a86c61f4d287b4ac5244653f","0x0112e0be826d694b2e62d01511f12a6061fbaec8bc02357593e70e52ba","0x4adfaa"]}
19:06:15:066 1b84 parse packet: 247
19:06:15:066 1b84 ETH: job is the same
19:06:15:066 1b84 new buf size: 0
19:06:15:194 1af4 GPU 1: got incorrect temperature 511, ignore
19:06:15:290 1af4 GPU 2: got incorrect temperature 511, ignore
I got this error once, and to fix I changed the riser and the PSU energy cable of the riser.
It's was the only way to solve the problem... if you don't have an extra riser, try just change the psu energy cable of the riser.