Fantastic. This worked a treat on my MeBook 4gb that I stupidly flashed with the Primer Firmware Upgrade.
Mine has the following chips:
1x Samsung 804 K9HBG08U1M
1x Rockchip RK2738
1x Infineon HYB39S2561600T-7
seeing that the Samsung 804 is a 40 pin chip I tried shorting the pins as shown in this diagram whilst plugging in.
Woohoo - One RK28xx device that came up... at that moment I stopped shorting the pins and then installed the firmware that chupito57 loaded. Thanks for the tip Chupito57 --- really good work