Used S7

[wizard8575]

I purchased a Antminer S7 from ebay that claimed it was tested a working with new fans.  I received it very poorly packaged with a hole in the box.  It had bent plugs for the cable that go from the card to the main board.  I started using it on nice hash and didnt like the amount of work I was receiving for it so I switch to slushpool It ran for a whole day and I noticed it is only getting an average of about 2.8 TH/s.  I looked at my status page and here is what I am getting.
Chain# 1   
ASIC#25   
Frequency 650
Temp 25   
ASIC status:oooooooo oooooooo oooooooo o
Chain#2   
ASIC#45
Frequency 650
Temp 53
ASIC status:oooooooo ooooo oooooooo oooooooo oooooooo oooooooo
Chain#3
ASIC#45
Frequency650
Temp 0
ASIC status;oooooooo ooooo oooooooo oooooooo oooooooo oooooooo 
 It looks to me like one of the cards is not working and that another one of them is not the correct one for the S7 can anyone confirm this?  The ASIC# is 25 for one. I am starting to feel like I got screwed by the seller.

[MinerMEDIC]

Run each card individually first to rule out a power supply issue. I bought an as-is S7 off eBay that was set at 700M and missing two chips in status . I turned it down to 650M and it's running perfectly. So if you do confirm that it is not a power issue take your speed back a little further. Could just be you got an old crappy overheated system with shit ASICs. If that's the case just baby it a little, there's nothing else you can do.

[fanatic26]

The 45 chip boards are all supposed to run at a stock speed of 700m. If running them at 650 makes them run properly they are most likely close to failing. It looks like you for sure have a bad board tho.

Also FYI if you are talking about the data cable plug on the hashing card being bent, that is actually how bitmain shipped a large number of s7s and without other signs of damage I wouldnt blame the seller for that.