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Macintosh SE blank screen, no P.O.S.T.

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I have recently purchased a Macintosh SE, which doesn't work. I have recapped both the logic board and analog board, and I have even replaced the RAM. When powering on, the fan starts up but there is no sound coming from the speaker and the screen is black. If I remove one RAM stick, the screen starts to show chaotic noise (which is normal because I haven't changed the jumpers) which means that the CRT circuitry is completely fine. What am I missing? Is there a bad chip that I should replace?


I really don't want to spend 90$ on a new logic board.


P.S: If listening closely to the speaker, it makes a repetitive clicking sound.


Thank you.

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