While it is always sensible to investigate a company's debt, in this case Jentech Precision Industrial has NT$3.34b in net cash and a decent-looking balance sheet. And it impressed us with free cash flow of NT$2.2b, being 72% of its EBIT. So we don't think Jentech Precision Industrial's use of debt is risky. There's no doubt that we learn most about debt from the balance sheet. However, not all investment risk resides within the balance sheet - far from it. For example - Jentech Precision Industrial has 1 warning sign we think you should be aware of.