Not sure if anybody is able to help but I hope so
![Smile :)](./images/smilies/icon_e_smile.gif)
So I assembled Harlequin rev g. Everything is in place, all jumpers are in the right position, but nothing is happening at startup. Nothing at all. I can see some signal coming into TV, because the grey screen changes its color a bit when I plug in composite connector. All I was able to test myself is the right voltage is coming from voltage regulator and the same voltage is present at CPU, ROM and a few other components (didn't check all of them).
My knowledge of electronics is very basic so I'm not even sure where to start. Is there a chance to get it working at all, if say I screwed something up while soldering components? Can some sort of troubleshooting be done by a rookie or would it require a great level of knowledge and special equipment?
One simple question to finish the post: does ZX Spectrum beep at startup? Mine doesn't produce any sounds.
Thanks a lot!
Sergey