Make sure that your Chromebook supports CCD (Closed Case Debugging) before ordering this debug board. Using this debug board will probably void your chromebook’s warranty. The seller does not take any responsibility for damage caused by this product, including software, firmware, and hardware damage. Also MAKE SURE THAT YOUR CHROMEBOOK IS NOT ENROLLED.

Use cases for this debug board

• Disabling firmware write protection on your chromebook without having to open it up.

• Unbricking your chromebook

• Chromebook debugging

This debug board is especially useful for Chromebooks that are hard to open up like the Pixelbook and Pixelbook Go.

Note: The GSC Debug Board requires a USB-C cable which can transfer data. It can be a USB-A to USB-C cable or a USB-C to USB-C cable. Most USB-C chargers that come with phones are compatible with this product. A quick way of testing if your cable is compatible is to try accessing your phone’s files through your chromebook by connecting your phone and Chromebook with the cable; if it works, then the cable is compatible with this board. If you don’t have a compatible cable then you can buy a cable as a variation of this item.

Mission Statement

Provide cheap, reliable Chromebook debug boards to as many customers as possible in a fair, transparent way.

The price of this product is determined by the costs (including materials and human labor) to make and sell the product. No extra profit is kept. I design / order PCBs in bulk so everyone can have the lowest price possible, so that customers know they are getting the lowest, fairest price.

Shipping Information

Shipping Schedule

I will try to ship items every day (besides Sunday) at ~4pm PST. Depending on what time the mail person picks up the items, they may be picked up on the same day or the next day.

Shipping to outside the US

This item should be able to ship to almost all countries worldwide. If you see that your country cannot be shipped to, message me on eBay.

USPS First Class Mail International Parcel

When I print a shipping label for this, I will not print a USPS First Class Mail International Parcel shipping label, because it does not have shipping insurance. I will instead print an eBay international shipping label, because it has shipping insurance. It may take longer to be delivered than a  USPS First Class Mail International Parcel label.

Bulk Orders

Do you want to resell the boards in your country so that others can purchase it at a lower cost with faster delivery? Do you want a lot of boards for some other reason? Message me.

Guidelines for reselling

• Make sure that customers will save money compared to buying it from me with international shipping

• Be transparent. Show your costs and explanation for any additional price.

• Don’t abuse your advantageous position. Don’t sell for a high price just because you can. Sell for a reasonable price based on your time and energy needed.

• Ship with environmentally friendly packaging if you can. I use compostable mailers and labels from EcoPackables. If you want, I can resell some of my compostable mailers and labels along with the boards (although I’m not sure how the added volume would impact shipping costs).

Handling Fee

An additional fee is included in the shipping cost in addition to the cost of a label. The shipping cost you see on eBay already includes this handling cost.

The handling cost is for creating shipping labels on eBay, packing the items, printing and applying the labels, answering questions on eBay, and managing transactions and balance.

About the Cables

Note: The Cr50 chip communicates as 12Mb/s. Using faster cables will not improve CCD speed. The debug board itself doesn’t consume power. The Cr50 chip will never consume more than 500mA.

Questions you may ask:

How do I check if this board will work with my chromebook?

Go to the Chrultrabook or MrChromebox docs and find your Chromebook. If the “WP Method” shows Cr50, then this should work with your Chromebook. 

Make sure your Chromebook is not enrolled (enrolled means managed by a school or organization). This board will not work on enrolled devices.

How do I use this board to disable firmware write protect?

Here are the instructions, which you can also view on the Chrultrabook docs:

Step 1: Enabling Closed Case Debugging (CCD)

1. Open VT-2 (ctrl + alt + f2 (right arrow)).

2. Login as root.

3. Run gsctool -a -o.

4. You will be prompted to press the PP (physical presence) button several times. This is a fancy way of saying to press the power button. This process takes several minutes and ends with the message PP Done!.

5. The device will suddenly reboot and exit developer mode. Re-enable developer mode and continue with the instructions.

Step 2: Disable Write Protect

1. Open VT-2 (ctrl + alt + f2 (right arrow)).

2. Login as root.

3. Plug in your cable

4. Run ls /dev/ttyUSB* to verify your cable is working. This should output 3 items, ttyUSB0, ttyUSB1, and ttyUSB2. If you do not see these items, try flipping the usb-c end upside-down, and try another usb-c port. If there is still no result, confirm your cable was assembled properly.

5. Run the following commands. This will disable hardware write protect.

• echo "wp false" > /dev/ttyUSB0

• echo "wp false atboot" > /dev/ttyUSB0

6. Run echo "ccd reset factory" > /dev/ttyUSB0 to be able to unbrick using a suzyqable, if needed.

7. Run gsctool -a -I to verify you have opened all the CCD flags. The current value for all CCD flags should be set to Y/Always.

8. Verify crossystem wpsw_cur returns 0.

9. Reboot.

What do you mean by “Debug Board”? I’m looking for a “Debug Cable”

The original SuzyQ sold by Sparkfun was a cable. Many people make DIY debug cables by cutting and soldering normal USB cables to a breakout board. The debug board works similar to a breakout board which you solder on a USB cable, except instead of soldering, you simply need to plug in a normal USB-C cable into the debug board.

Basically, This Debug Board + A normal USB-C cable (with data transfer) = Debug cable.

A debug board is cheaper and stronger than a hand-soldered debug cable, and uses less materials because you can use your own cables without damaging them.

What happened to “chromebook_kid” on eBay?

I used to sell on my eBay account named “chromebook_kid”. I switched accounts and now I sell on this “chocolateloverraj” account.

What if the debug board is not working?

• Make sure that your chromebook supports CCD

• Try all of your chromebook’s USB-C ports

• Try to connect the debug cable upside down

You can message me through eBay and I will try to help you, but note that help with troubleshooting is not guaranteed with the purchase of this item.

How is the price determined?

The price is split up into different costs. Here is a chart of the costs:

Why are shipping costs so high?

In addition to buying the shipping label, I include a handling fee (see section above) per order. As of July 17 2025, all boards being sold were impacted by a 50% tariff, which increased the price.

GSC Debug Board Cost

GSC Board + 1.2m 480Mbps Cable Cost

Why are returns not accepted?

• I would have to sell used boards at a lower cost

• eBay does not allow returns with partial refunds, so I would have to give a full refund and I would lose money

• I would have to open returned packages and verify that they are in working condition

After you’re done using it, I encourage you to resell the board, keep it in case you need to unbrick your Chromebook, or give it to someone else to use.

Why does part of the revenue go to you?

These are the things I did / do which I am paying myself for:

• Research in how to make the debug cable, research in what materials to buy

• Designing the PCB

• Getting the PCB double checked by other people

• Contacting multiple PCB manufacturers, finding the best price

• Adjusting PCB to meet the manufacturer’s requirements

• Some of the money from selling these PCBs covers the cost of prototype PCBs for this item

• Testing the debug board

• Packing and shipping the debug cable

Why do you sell on eBay, even though it has fees?

• The item can be found on eBay and Google search results.

• eBay is a trusted website for buying stuff

• You can see the reviews of the item and the seller’s reputation on eBay

• Customers are protected by the eBay money back guarantee

• eBay provides an easy to use buying, shipping, feedback, and refund platform

• eBay handles collecting taxes