[Red Light of Death and similarities] - Final fix
just wanted to say that after several months of troubles when i was randomically experiencing the red light issue - mine was not properly what has been defined red light of dead - it seems i can finally fully enjoy my phone.
Please notice i never had black / frozen screen and red light after a forced power off. What happened to me was that i was always scared to reboot / power off, cause many many times (at least 50%) the phone was then unable to reboot/power on, not showing ANY red led, until the charger was plugged in, and a boot attempted: at that point only a single fast red blink was showing up, about every 10-12 secs.
In past sometimes i was able to revive the phone by holding power button + rocker up for 1 minute, but the majority of times i was forced to literally wait hours (4, 8, or more) until finally WITHOUT any charging attempted the phone was able to power on. (and btw always showing battery with 60% or more).
At the end after having tried even the battery disconnection, i bought a spare original battery on the bay, replaced it, and now everything works fine since more than a week and more than 30 reboots / power off, which for my previous troubles is a valid test case.
Hope this helps those of you are experiencing and struggling against similar problems.