The Hewlett Packard (Agilent/Keysight) 0950‑2315 is a modular power supply assembly used in test and measurement equipment such as the HP 83711B/B, 83731B/B, E2500B‑508 and E2507B series. Common failure modes for this class include degraded output regulation due to aging voltage regulator ICs or electrolytic capacitor failures, overheating of internal switching components, and connector corrosion leading to intermittent power delivery. First‑check diagnostics: verify input voltage and polarity at the supply’s connector; measure output rails against nominal values while monitoring for ripple spikes; inspect the PCB for burnt marks, cracked solder joints, or swollen capacitors; and review any error logs from the host instrument for abnormal power‑supply status codes.[oss-gpt-20b]