Firstly, you have to remove additional nine screw using a philips screwdriver. And then, you have to de-soldier all the legs from the CPC 464 ROM chip, remove it and replace with [http://www.maplin.co.uk/p/dual-in-line-socket-28-pin-bl21x DIL Socket 28-Pin] (Maplin ref no: BL21X, which it costs about 14p each - current price is now 44p each), making it easier to swap 464 or 6128 ROMs and visa versa, then solder all the legs from that socket onto the motherbaord.<BR>
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Next, put the CPC 6128 ROM chip printed "AMSTRAD 40025 8902 B" inside the DIL 28-way socket. Put all the bits into place, put the keyboard cover back on and then put six screws back on. Now to test your handy work... After your computer powered up with all accessories, your screen should show exactly the same as [[Media:Cpc6128.gif|CPC 6128 start-up ]] screen.<BR>
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NOTE: <BR>