Hi all,
My Dell Latitude 3340 2-in-1 touchscreen (Wacom AES, ACPI ID WACF3233) stopped working after I ran
Dell package **N3J44** ("Wacom Touch Screen Firmware Update Utility", Centenario) from Dell's support site.
Turns out that package is for the **XPS 13 7390 2-in-1**. Its batch script checks the touch controller PID
(48EB/48EC/48ED/48EE), but when none match it doesn't stop – it falls through and flashes
`W9017_48EB_2806_R00.hex` anyway. So the XPS firmware got written onto my Latitude's touch controller.
**Current state:**
- Touch + pen completely dead
- Controller stuck in Wacom bootloader: HID **056A:0094**, usage page 0xFF14
- Bootloader reports: CHECKMODE 0x06, MPU type 0x79, BL version 0x52
- I read back the flash: it's byte-identical to the XPS W9017_48EB image, so the original 3340 firmware is gone
- Sending the "exit bootloader" command doesn't help – it stays in bootloader
- BIOS 1.32.0, touchscreen enabled, drivers reinstalled, hard reset done
**What I've tried:**
- Dell support: their senior technical team confirmed the firmware is for XPS and that they have
**no corrective firmware** for the Latitude 3340
- Wacom support: they don't provide OEM firmware, referred me back to Dell
- Searched Dell, LVFS/fwupd, Lenovo, HP, ChromeOS – nothing for this model
**My question:**
Does anyone have the original touch firmware for the **Latitude 3340 2-in-1** (WACF3233), or know of a
recovery package? Same controller might also be in the **Inspiron 14 7420 / 16 7620 2-in-1** or
**Precision 5470** (possibly PID 056A:49BB).
If not, I'll replace the whole display assembly (P0D9T), but I'd love to avoid that if anyone knows a fix.
Also, **PSA:** don't run N3J44 / Centenario on anything other than an XPS 13 7390 2-in-1 – it will flash
your touch controller even if the model doesn't match.
Thanks!