Quote from: 5415551212 on Yesterday at 10:32:36 PMI have had luck with a poor mans contact cleaner 50/50 mix of WD-40 mixed and 99% IPA.Wd-40 can turn gummy over time. As a relatively inexpensive spray cleaner/lubricant, I usually use CRC 2-26. Around here the phone repairmen always carried a can in their toolboxes (along with Western Electric Contact Cleaner). It's available at Home Depot in the electrical section. It costs more than WD-40, but is cheaper than DeoxIT.
Or you can purchase a contact cleaner such as DeoxIT
Quote from: HowardPgh on Yesterday at 04:00:00 PMI have recently troubleshooted my phone and found the reason for its poor functioning. Symptoms were weak transmit and low sidetone and receive volume. Problem is in the keypad's muting switch that's on the back of the dial. I tried cleaning them but the contact is poor on several of the normally closed contacts. I'm not sure if its the contacts themselves or the thing that activates them not fully returning to rest.Can you post a photo of the contacts?
Conclusion: Bad keypad (35AF3 I think)
Quote from: Shockandawe on Yesterday at 11:59:14 AMWhat is or was the thing on the side of the box. (IMG 4)The missing item was a lightning arrester.