Different lot number part numbers reference the same part: CQ891-67019
One Year Exchange Warranty
The part you will receive includes a One Year Exchange Warranty.
It is verified to work without errors by me -- A HP Certified Technician trained to work on the HP DesignJet printers since 1995.
How does a defective core exchange work?
THIS ITEM REQUIRES THE RETURN OF YOUR DEFECTIVE PART.
I can ship immediately. SHIPPING TODAY REQUIRES A $100.00 REFUNDABLE CORE DEPOSIT. An invoice for the CORE DEPOSIT will be emailed to you via Paypal (credit card accepted). A pre-paid shipping label for the return of the defective part will be included in the package (US customers only).
I send you a pre-paid shipping label for the return of the defective part. When the package tracking number for your defective part is registered on the USPS website, your replacement part will be shipped to you.
I've had service calls on several T120 with similar error codes. The last one was BA7E70E6. The 'B' codes harkens back to the day when I routinely saw this type of error on the old 1050c\ 1055cm models. I used to tell customers you have the 'error code of death'. In more technical terms, the Main PCA Board has a defective chip or routine call somewhere on it and needs to be replaced. Replacing the (CQ891-67019) has resolved the error for me.