Product Details Reviews Shipping & Returns Product Details Compaq CQ50 Laptop Key Replacement NOTE: There are 4 version of this keyboard, the keyboard looks the same from the top, but the hinges under the key cap are different. HC29, and HC37 are very easy to tell apart, but HC12 and HC38 are a little harder to tell, HC12 Has a wider bottom metal tab, the HC38 version has a narrow bottom metal tab. HC12 HC29 HC37 HC38 Reviews 1 Review Hide Reviews Show Reviews –> great key and fast shipping 5 Posted by Dan Parks on 25th Jun 2019 I was able to order the key and 3 days later install the key, i say that’s fantastic.