This morning I unplugged all peripherals and connected the Pi to power. After 7 seconds the CPU/GPU/RAM CHIP started quickly heating up to have had reached temperature very hot to touch (basically you have to remove your hand away: I do not have anything to measure temp but this was very hot) within another 10 seconds. Quickly the whole left half of the board (starting from around power-in) became as hot as the CPU. So CPU first, than the whole left side of the board. The red light turned off after about 35 seconds.
After the light turned off, the board became quickly colder. This means there is a switch which turns off the Pi when there is an increase in temperature and NOT knowing if there is a short, otherwise it would turn off the device after 1-2 seconds, or it wouldn't start it at all. However this also means the Pi is not dead, it only heats up too much.
Are we 100% certain this is caused by a short and not some other problem in Pi like a CPU failure (knowing it is the one that heats up first) ?????!!!!!?????!!!!!!!
To look for shorts with a multimeter might be a tedious process, as even the conducting thin golden lines have to be measured. Any voltage would indicate OK I guess. However, I only have 30 seconds to measure. I guess you cannot look for a short without power supply??!!! Can I?
Here is a link that many have used to fix circuits.
I will read it throughout the day. A question so far (I am sure I will have many as I read through this valuable reading and guaranteed for accurateness) : Is Raspberry Pi :
Class 1 General Electronic Products
Class 2 Dedicated Service Electronic Products
Class 3 High Performance Electronic Products
It is not printed on the board which class...
Second, there is a shortsniffer hardware unit (costs around 200 USD)
Check out the site.
I guess it would be useful to have this toy in my profession (Comp Technician ++++++ IT and computer science ++++++ Programming++++++Web design) as you do get supposedly dead motherboards and "cards" which might only have a short. In 1996, we used to take a card and re-solder all soldered parts, as an exercise I thought was silly and couldn't even today find 100% clear explanation in my head as to why we did this with the service having around 20 computers ready for repair.
NOW, How do you fix a short on a circuit such as Raspberry Pi?