Quoted from N8man:
last night playing LAH flipper tip broke off player held flipper up and the game freaked out starting reseting multiple times.
My research has lead me to believe the reset could be a Bridge Rectifier issue, and or diode at the coils.
So upon inspection PS board BR is a MB351. looks like its been replaced
2 above the large capacitor are MB351. looks like its been replaced, one is loose on backplate.
and the PPB is a MB354. looks to be original.
Should i replace all or some which ones?
i have 2 Bridge Rectifier - 35amp 600volt KBPC3506W on the way, and locally can get 35amp 1kv (will theses work or overkill?)
No problem. 1kv is just a higher rated part than the 600v part you have coming in the mail.
I would not just randomly replace them. As I mentioned in the post above, determine where your problem is.
They are very difficult to remove without damaging the pads and traces.
Yes, it is good to check to see if there is a broken diode on the coil, but also use your ohmmeter to see what the coil ohms are. You can compare the ohms of all the flipper coils to see if there is a big difference in the resistance.
But regardless of what you find, replace the C2 (100 uf 25 volt capacitor) as this one holds the 5volts stable, but if it leaks or just fails, you will have random resets.