After taking old battery out of timex watch a yellow flash appeared on screen and will not go away, even after putting new one in...what is problem?
That's a "REALLY TRICKY BIZ MAN !!", opening the watches is nerve racking to say the least. Just out of curiosity, was your watch a "waterproof watch" by chance? They have these intricate rubber gaskets, so small I can't think of anything to compare them to & when you go to change the battery, even when a pro does it at the store, it does not always work!(I got a free new watch when my $6 replacement battery messed up the timer, and couldn't be fixed properly !! Felt sorry for the clerk, & HAPPY for me !).
I don't men to insult you in any way, but are you 100% sure you have "ALL" the pieces, and they arer all in the right place? Of course the other obvious thing is to just go to Walmart, or some lower end jeweler, and ask for some advice, help, or even "Ya got any great deals on a watch man? "
Good Luck To You !
Geoff