Fix a Windows boot loop with AHCI

My wife’s computer was stuck in a Windows boot loop. We’d get the Windows 7 boot screen, and it would display a single pixel of the Windows 7 logo, then reboot itself endlessly. Booting in safe mode made it fail on classpnp.sys.

Any number of things can cause this, and it usually happens after you swap a motherboard. Enabling AHCI turned out to be the fix. Enabling AHCI also can be easier said than done, but I figured it out. She’s running Windows 7 (for now) but these same tricks should also work for Windows 10.

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All about the Lionel ZW

All about the Lionel ZW

The Lionel ZW is Lionel’s most iconic transformer of the 1950s and 1960s, and perhaps one of its most iconic products, period. Everyone wanted the two-handled, football-shaped, 275-watt powerhouse that was the ZW. It was one of Lionel’s more venerable postwar products, lasting on the market for 18 years from 1948 to 1966. It replaced Lionel’s former top-of-the-line transformer, the Z.

Finding original ZW instructions or an original ZW manual online is a bit difficult, but there’s plenty the original instructions don’t mention.

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Lionel KW diode installation

Lionel KW diode installation

Lionel transformers use a selenium rectifier disc to produce a jolt of DC voltage to activate their train whistle. These discs degrade over time, so a decades-old transformer often produces a pretty anemic whistle–even one of the bigger transformers like the 190-watt Lionel KW. Replace the disc with a diode for a cost effective and reliable fix for that wimpy whistle. Here’s a step by step guide to a Lionel KW diode upgrade.

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