Updated A problem with some 400MHz mobile Intel processors in notebooks has caused Toshiba to issue a warning to its resellers after it discovered machines failing last month. The problem is not just confined to Toshiba notebooks, we now understand, but also affects other PC vendors, some of which have only just woken up to the issue. The glitch in the chips, which causes some systems to overheat and then shut down is caused by a faulty batch of mobile 400MHz processors, both Celerons and Pentiums, an Intel US representative confirmed. Intel said it has now addressed the problem and issued Toshiba with a fresh batch of healthy microprocessors. While there is no figure on how many machines worldwide are affected, a Toshiba spokesman said that it had first noticed the problem here in Europe because of its quality control process and alerted Intel to the problem. Toshiba then notified its resellers, and worked on a fix, which is a comparatively simple process, the spokesman said. An Intel UK representative said that the company here was aware of the problem, which is now resolved. But other vendors have now begun to notice similar glitches in notebooks using the faulty batches of 400MHz mobile chips. According to one reliable source, Intel and Toshiba are likely to make a joint statement on the problem at some point next week. The 400MHz processors made by Intel are a popular choice for end users. ® There is a CRN story about Toshiba notebooks here. ®