We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small green circuit board with USB port and SD card slot

DELL

DELL Inspiron 3781 USB SD Card Reader IO Board T7MK7

SKU CH-6E9F-HPCVE

Genuine Dell OEM IO board with USB port and SD card reader for Inspiron 3781 laptops

  • ProcessorLaptop-computer-replacement-parts
  • Genuine Dell OEM part ensures exact fit for Inspiron 3781
  • One USB port and SD card reader slot integrated on single IO board
  • CMOS battery connector built in for system time retention
  • Replaces Dell part numbers T7MK7, CAL70_IO_BOARD_FFC and NBX00028F00
  • New condition guarantees reliable performance as original equipment

Genuine Dell IO board for Inspiron 3781

This genuine Dell OEM IO circuit board carries part number T7MK7 and fits the Inspiron 3781 laptop. It provides one USB port, an SD card reader slot, and the CMOS battery connector in a single daughterboard assembly. The part is new and matches the component originally installed by Dell.

Suitable for owners repairing a faulty port

Technicians or owners replacing a damaged USB port, SD slot, or CMOS connector on an Inspiron 3781 will use this board. It is not for buyers who need a different Dell model, an external card reader, or a board with additional ports or features not listed here.

Part number T7MK7 confirms exact fit

The DPN T7MK7 and alternate references CAL70_IO_BOARD_FFC and NBX00028F00 identify this specific IO board for the Inspiron 3781. Matching this number to your service manual or the sticker on the original board is the single specification that decides whether this is the correct replacement.

How it compares

Measured against everything we stock in USB & Internal Card Readers, at today’s prices. Recalculated every night.

Price $10.99
Cheaper than about 80% of the 511 comparable items (median $18.99).

Specifications

Product
Brand nameDELL
Processor
ProcessorLaptop-computer-replacement-parts

Questions about this item

Does this IO board fit any laptop other than the Inspiron 3781?

No, the board is listed as compatible only with the Inspiron 3781 model.

If I keep my existing CMOS battery, will the connector on this board accept it?

Yes, the board includes a CMOS battery connector designed for the original battery used in the Inspiron 3781.

After fitting the board, how can I confirm the SD card reader and USB port are working?

Insert an SD card and a USB device; both should appear in File Explorer and Device Manager without errors.

More in USB & Internal Card Readers

Similar items