Hi6555 V110 Power IC

When a Honor 6X or GR5 Mini comes into your shop completely dead — no charging light, no display, nothing on the logo — the power line is usually where you start. The Hi6555 V110 power IC sits at the center of that power line. It's the PM (power management) IC that takes input from the battery and charging circuit and distributes regulated voltage to the CPU, memory, and display driver. If this chip develops a dead short or a cracked ball under reflow stress, the whole board goes dark, and no amount of software flashing fixes it.You'll usually reach for this part in one of three situations. First, a phone that's dead after a drop or liquid exposure, where continuity testing on the power rail shows a short traced back to the PMIC. Second, a board that was already reworked once and the original chip got damaged during removal or reballing. Third, a unit stuck in a boot loop or hang on logo where voltage sequencing checks point to PM chip failure rather than a software fault. In each case, swapping the Hi6555 V110 restores normal power sequencing without touching any other component on the board.This is a BGA-package IC, so reballing and hot air rework are part of the job. A stable hot air station, flux, and a steady hand under the microscope matter here — the ball pitch is tight, and a cold joint or bridged pad after reflow will bring the same dead symptoms right back. Preheat the board evenly before you lift the old chip, clean the pads thoroughly, and reball with matched solder before placing the new IC. Skipping proper board cleaning is the most common reason technicians end up reworking the same spot twice.Because it's the same part number and marking as the original factory component, you don't need to touch firmware or run any calibration after the swap — power up the board, and if reflow was clean, the phone should boot normally. That said, always verify with a multimeter or power supply box before reassembly. Feed test voltage through the charging port and check current draw; a healthy board pulls current in a predictable step pattern as it powers on. A board that still shorts or pulls excess current after the chip swap usually points to a secondary fault elsewhere, not a bad IC.Stock this alongside your other Honor 6X and GR5 Mini repair parts — display flex, charging port, and battery connector — since dead-board jobs on this model often need more than one component replaced in the same visit. Keeping a few of these on hand means you're not waiting on a supplier when a dead-phone job walks in and the customer wants same-day turnaround.This part fits directly into standard PMIC-level board repair workflow: diagnose the short with a multimeter or thermal camera, isolate it to the PM chip, remove and reball, place the new IC, then retest power draw before reassembly. It's a straightforward swap once you've confirmed the fault, and it's one of the higher-success repairs for this device family when the rest of the board is clean.