what to check before buying used s9SE 17TH miners

Hey everyone, I’m looking for some advice on how long we should really test used rigs before making a purchase. Is running it for just 10 minutes a solid enough test? What other stuff should I keep an eye on... any guides or suggestions?

I think 15 to 30 minutes would be enough to test the miner and a bit shake to check if there is a rattling sound inside the miner if you heard something inside there might be a loose heatsink that could lead to a short circuit. Also, check the kernel logs you can see other issues and problems there then check the miner status if the miner is running without overheating and running with the right hashrate.

Do you have any guide on teaching how to read the kernal log errors?

All guides are already on Bitmain you just need to search a little bit to find them. Anyway, check these links below - 【For S9series】Common problems indicated by miner's kernel log and ways to resolve them - 【For S17series】Common problems indicated by miner's kernel log and ways to resolve them It's not complete but it still can help you to troubleshoot the problem through kernel logs.