Device / model: PlayStation 5, CFI-1100 series
Board number: EDM-020
Symptom: press power → one beep, no fan, no LED, nothing on HDMI
History: first find was capacitor C7112 (input cap of IC7101, the 1.8V_SOC_VDDA regulator) dead short to ground. C7112 removed, short gone — but the console still did the single beep.
Measurements
- Bench 12 V into the PSU connector CN7001: 46–48 mA for 15–20 s, then 2 mA steady. Power button → beep, current never rises.
- Subsystem PMIC IC7002 (DA9065): comes up normally on button press — all its outputs present (1.15 V, 1.8 V, 3.3 V SS rails), reset released. So the southbridge side wakes up fine.
- IC7107 (TPS53219, makes 5V_MAIN): VDD = 12 V, but EN = 0 V — the main power-on signal
PSW_MDCDCis never asserted. /AC_IN_DET= 3.24 V (correct: 12 V × 10k / 37k). The board knows main power is present.
The trap (where the hours went)
Everything above points at “the controller refuses to turn on main power” — firmware, flash, RTC battery, the EN circuit. All of those were checked and all were healthy:
- IC7107 forced on through its EN pin → it runs perfectly, 5V_MAIN = 5.31 V. Still single beep.
- SPI flash IC5001 dumped — structure intact. (Don’t flash a “reference” dump from the internet — revisions differ.)
- CR2032 removed and board discharged — no change.
Two things fooled the measurements:
- L7113 is not on 5V_MAIN. Reading open-circuit between JL7102 (5V_MAIN) and L7113 is normal — they are different rails, not a broken trace.
- L7113 and L7102 are not-fitted footprints (pads bridged with copper on the board). Only L7104 is a real inductor here.
Root cause
The C7112 short didn’t only kill C7112. It sat on 5V_ACPI_SOC, which is fed from 5V_EVER through fuse F7001 (5 A, 24 V, FMC10502WH) — and the fault current blew F7001.
5V_EVER ──┬── F7001 5A ──► 5V_ACPI_SOC ──► SoC standby (S5) rails:
│ 3.3V_VRM, 1.8V_SOC_V18_S5, 3.3V_SOC_V33_S5
├── F7003 5A ──► 5V_ACPI_SSB ──► IC7002 (intact - why the SS rails were fine)
├── F7002 5A ──► 5V_ACPI_WIFI
└── F7502 5A ──► 5V_ACPI_FC
Where they are: F7001 is on side A. C7112 is on side B, right beside IC7101. So the short and the blown fuse are on opposite sides of the board.
With F7001 open, the SoC standby rails are all dead. The controller wakes, brings up its own rails through the intact F7003, finds the SoC standby domain missing, beeps once and refuses to assert PSW_MDCDC. Correct behaviour — the board was protecting itself.
Fix
- Confirm: CL7113 (3.3V_VRM), CL7114 (1.8V_SOC_V18_S5), CL7115 (3.3V_SOC_V33_S5) all 0 V → F7001 open.
- Before fitting the new fuse: check 5V_ACPI_SOC to ground is no longer shorted (otherwise the new fuse blows instantly).
- Replace F7001 with the same rating: 5 A / 24 V. Sony’s parts list allows FMC10502WH, Littelfuse 0435005 or Panasonic ERB-RD5R00X, so any of the three in the same size will do.
- Undo any diagnostic jumpers (e.g. forced EN on IC7107) so the power sequencer works normally.
The other fuses worth a quick check
F7001 has three brothers on 5V_EVER, all 5 A. A short on any of their rails can take the fuse out the same way. Check them power-off with the meter across each fuse: a good fuse reads close to 0 Ω, and an open one is blown. The orange silkscreen label marks each one.
Close by are the fuses on the main rails, which only matter once the console powers on: F3501 (2.5 A, 12V_MAIN), F3502 (2.5 A, 5V_MAIN → USB-C) and F7501 (5 A, 12V_MAIN → M.2 power).
Lesson
PS5 single beep + no fan + current dropping to ~2 mA after a C7112 (or any 5V_ACPI_SOC) short → measure F7001 first. A shorted cap on a fused rail usually takes the fuse with it — check the fuse before chasing regulators, firmware or the controller.
Was this your fault too? Post your readings below — and if it fixed it, mark the solution so the next person finds it.