<div dir="ltr"><div>Actually, let's be fair to Dell here. They have replaced five machines.</div>
<div>Those five machines will have an up-to-date BIOS version. There may well have been a problem which has been fixed in this BIOS version. I would use dmidecode, and make sure that all your machines have an identical BIOS version.</div>
<div>Any that do not - download and flash the BIOS.</div></div>