Noise Signals Interpreted As Keystroke During Boot Display

• Microsoft Windows NT Server versions 3.51, 4.0
• Microsoft Windows NT Workstation versions 3.51, 4.0

SUMMARY

MORE INFORMATION

Windows NT's boot option display has a feature whereby one can stop the countdown timer by pressing a key on the keyboard other than the enter key. The result of this action is that Windows NT will then wait indefinitely until the user makes the preferred selection and presses the enter key to continue loading an operating system.

Some keyboards, switch boxes, and BIOSs can mistakenly send random electronic noise signals that NTLDR interprets as a keystroke and, thereby, determines that the user has instructed it to not display or process the time-out countdown.

SYMPTOMS

When Windows NT boots, it displays the boot options available in the boot.ini.

Normal function of this display is to offer options to the user while counting down a preset number of seconds before loading a default operating system.

Occasionally, the display will not indicate a countdown in progress and will not load an operating system by default but will wait indefinitely until a user selects an operating system option and presses the enter key.

RESOLUTION

To work around this problem, upgrade the offending BIOS or attach different keyboards or switch boxes and test for symptom recurrence.

Keywords :
Version : WinNT:3.51,4.0
Platform : winnt
Issue type : kbprb