# \#short-circuit

**URL:** https://forum.nopowerfix.com/tag/short-circuit/18.md

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## [iPhone 12 Pro Max No Service, No IMEI, Modem Firmware blank – FIXED, one shorted capacitor, not the baseband CPU (A2411)](https://forum.nopowerfix.com/t/iphone-12-pro-max-no-service-no-imei-modem-firmware-blank-fixed-one-shorted-capacitor-not-the-baseband-cpu-a2411/41)

<div class="topic-metadata">

**Author:** [@NoPowerFix](https://forum.nopowerfix.com/u/NoPowerFix)\
**Replies:** 0\
**Last updated:** [November 5, 2026, 3:06pm UTC](https://forum.nopowerfix.com/t/iphone-12-pro-max-no-service-no-imei-modem-firmware-blank-fixed-one-shorted-capacitor-not-the-baseband-cpu-a2411/41 "2026-11-05T15:06:14Z")

</div>

Device: iPhone 12 Pro Max, A2411, iOS 16.5.1. Two boards in a sandwich: 820-01940 on top (CPU) and 820-01971 at the bottom (RF, baseband). Symptoms: No Service. The Modem Firmware line in Settings \> General \> About was …