I2C suddenly not detecting slaves on the bus with ODROID-C1

[EmbeddedGuy]

I have been using a ODROID-C1 for a while but suddenly i am not able to see any of the slaves with i2cdetect.

Here is what i get form the output:

$this->bbcode_second_pass_code('', 'i2cdetect -y -a 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
30: -- -- -- -- -- -- -- -- 38 39 3a 3b 3c 3d 3e 3f
40: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: 60 61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f
70: 70 71 72 73 74 75 76 77 78 79 7a 7b 7c 7d 7e 7f ')

I should only have a slave on address 13.

I have tried to change the address of the slave and also tried to connect 10 different MCU controllers on the I2C bus.

What is wrong?