Like most companies AMD already owes creditors large sums of money in the shape of IOUs or bonds. Nothing wrong with that as long as a company can pay the interest and is considered creditworthy enough to get additional loans at reasonable rates.
Another way for a company to get money is to attract outside investors by selling shares. Owning equity in a company in the form of shares does not make you liable for losses. On the other hand, many profitable companies reward investors by sharing profits in the form of dividends.
AMD's revenues minus costs added up to a net loss of $180 million in Q1 and another $181 million in Q2. In fact 9 of the preceding 12 quarters were not profitable. So the company must either raise revenues and/or cut costs, renew or get additional loans, or issue new shares. Raising revenues is hard in the competitive field. Cutting costs is hurting the company's ability to compete. Loans are considered riskier if there are no assets in the company to offset them, so that gets pricier. Shares don't accumulate in value if the company doesn't grow or pay dividends, so there's less appetite for that. At some point it just stops working out.