START--<--------------------------------------------------------------------------+
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CHECK TV TUNED OK. TRY                                                            |
CHANNEL 36. VOLUME UP                                                             |
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CONNECT PSU TO 240V                                                               |
AC MAINS. CONNECT TO                                                              |
TV SOCKET                                                                         |
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HOLD DOWN BREAK KEY                                                               |
AND PLUS IN 9V LEAD                                                               |
INTO COMPUTER                                                                     |
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     |              NO                           NO                               |
RED LED LIGHTS UP?------------>-MAINS FUSE OK?-------->-REPLACE FUSE----------->--|
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YES  |                                |                                           |
     |                NO              | YES                                       |
PICTURE/SOUND ON TV?----------->-+    +-----------------CHECK LED, PCB---->--+    |
     |                           |                      CONNECTOR            |    |
YES  |                           |                                           |    |
     |                           |           NO                              |    |
PRESS AND RELASE                ANY PICTURE---------->--CHECK MODULATOR,--->-|    |
RESET BUTTON                    AT ALL?                 DC-DC CONVERTOR      |    |
     |                           |                                           |    |
     |           NO              |YES                                        |    |
MENU APPREARS?---------+         |                                           |    |
     |                 |         |                                           |    |
YES  |                 |         |                                           |    |
     |                 |         |          YES                              |    |
PRESS DOWN ARROW       |        ANY SOUND?--------------CHECK ULA, CPU---->--|    |
     |                 |         |NO                    RAM, TEA 2000        |    |
     |           NO    |         |                                           |    |
BLUE BAR ON MENU---+   |        CHECK MODULATOR---------------------------->-|    |
MOVES?             |   |        SOUND COIL TUNING                            |    |
     |             |   |                                                     |    |
YES  |             |   +------>-CHECK ROM------------------------------->----|    |
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SELECT 128K BASIC  |                                                         |    |
PRESS ENTER        +---------->-CHECK KEYBOARD----------------------------->-|    |
     |             |            CONNECTORS, ULA                              |    |
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TEST ALL KEYS      |                                                         |    |
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     |    NO       |            RECTIFY AND RETEST----<----------------------|    |
ALL OK?------------+              |                                               |
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YES  |                            |                                               |
     |                            +-------------------------------------------->--+
DO TAPE TESTS