Comment Re:overheat (Score 1) 91
Mine (not quite that early) had a bug that gave the wrong colours with our (Hitachi?) TV. According to Sir Clive, this was the fault of the TV manufacturer for 'not following standards'. Expecting Sinclair to test the Spectrum hardware with a range of commonly used televisions before release was, of course, completely out of the question...
I originally had the 16k model, partly funded by the refund from a ZX81 (actually two in succession) that had conveniently died - QC was not Sinclair's strong point. Increasing this to a (massive!) 48k was my first experience of an internal hardware upgrade, with chips bought from some mail order supplier that advertised in the back of Sinclair User. They were buggers to insert (an uncle with electronics experience was enlisted to help force them into place without trashing anything).