Second , as far as the vendor is concerned 7 months is quite a long time to pass and he will be unlikely to be able to rescind on the basis of satisfactory quality and could only claim damages .
Quite right you cannot reject after this length of time and in this situation. However, he would be entitled to a satisfactory repair or like-for-like replacement. If a repair or similar replacement is not possible, then you are looking to rescind the contract and claim damages. (Sale and Supply of Goods to Consumers Regulations 2002).
After 7 months the burden of proof is on the buyer to prove it is faulty. So if it were to go to court, say, it would be down to PDJ to prove that the fault is inherent in the product and not caused by something he had done. Within the first six months it would be down to the trader to prove that the item is *not* faulty.
Proving that he had not spilled anything on it could be tricky to do - he'd need to get an independent opinion.
It's always best to chase the trader under the Sale of Goods Act 1979 (as amended by the Regs above) as if you go back to the manufacturer you could be compromising your future statutory rights (which otherwise could potentially last for up to 6 years). Manufacturers' warranties since March 2003 are legally binding, but dependant on the terms and conditions laid out in the warranty.
However as Ardross says, these terms should not be unfair. An unfair term is any that puts the trader in a stronger position than the consumer.
They shouldn't have carried out any work they were not authorised to do by you - if this is the case, you could ask them to put the item back into the condition it was in before, as you had not authorised the work.
Of course, then, you are still in the position of fighting to prove your case, and it complicates things that the manufacturers have done work on the machine....
There isn't really anywhere that you can make a complaint about Toshiba - in a civil matter such as this, the only body with power to order them to carry out any action is a judge in the small claims court.
Sorry that I can't be more helpful - and I hope this makes sense, only I am at home now and have had a long day dishing out advice so am a bit frazzled!!