Repair Guides

Complete capacitor replacement for the legendary Marantz 2270. Covers the main filter caps, tone board electrolytics, phono section, and protection relay cleaning. Cap values and Nichicon KW series part numbers included.

The original Astec PSUs in the Apple IIe are ticking time bombs. Replace the filter caps and output diodes before they take your motherboard with them. Includes safe discharge procedure.

The definitive SNES cartridge connector guide. Which replacement pins to buy, how to clean the existing connector without damaging it, and why the blowing trick is slowly destroying your cartridges.

Bulging caps are the #1 cause of no-POST failures in PCs from 2003–2010. Visual identification guide, ESR testing procedure, and safe high-voltage discharge steps before you open the PSU.

The 80W Pioneer flagship from 1977. Full output transistor replacement procedure, bias adjustment with service manual specs, and why DC offset must be dialed in before you connect any speakers.

Shadow mask CRTs drift over decades. Manual degaussing coil technique, convergence ring adjustments, and a realistic assessment of when to fix it versus sell it for parts.

The 120W Kenwood beast from 1976. Notoriously complex layout with a full service overhaul covering recap, bias, DC offset, and the finicky protection relay that kills channels without warning.

Diagnosing a dead or weak SID chip with audio tests and a multimeter. Covers socket installation so you don't burn another chip, plus modern replacement options including the FPGA-based SID clones.

The original DMG Game Boy screen replacement — IPS panel install, bivert mod for contrast, and corrosion repair on the battery contacts. All three covered start to finish.