Question about Panasonic KX-TG5777 Cordless Phone
Battery is new and fully charged, cannot do anything with the phone except answer and dial out
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Display is not working properly
There are 2+ possibilities.
If the LCD went out after a bad fall you may have cracked the display behind the scenes where you can't see it.
If the phone has EVER been exposed to water or high humidity.... (even 2 years ago) then corrosion in the connector for the LCD may have grown to the size to effect the operation of the LCD. If you feel comfortable taking the phone apart and removing the LCD you may see the corrosion... you can clean the LCD cable with isopropyl alcohol and possibly help the connector itself using a few drops of isopropyl and a tooth brush. If you do not visually see any corrosion then don't clean it... it would have to be visible to stop the LCD.
These LCDs can go bad on their own but it's rare.
Posted on Jun 12, 2008
SOURCE: I have a Panasonic KX-TG6051CM
I had the same problem, and it seems that the battery charging circuit in the handset had locked up, constantly charging the battery until it overheated. I was able to reset the circuit in my handset by completely draining the battery. Here is the procedure:
1. Remove the handset from the charging cradle, and leave it on for a few days until the battery runs out, and the handset finally turns off. At his point, the battery will be very low, BUT NOT COMPLETELY DRAINED.
2. Next, you must manually drain the charge remaining in the battery by shorting out the two contacts on it. Shorting won't damage the battery, since it is holding very little charge at this point. An easy way to physically do this is to remove the battery, and place a piece of thin wire across the the two contacts of the HANDSET. I am referring to the contacts inside the handset that connect to the battery, NOT the contacts on the bottom outside that connect the handset to the charging cradle. Next, put the battery back in, sandwiching the wire between the battery's contacts and those inside the handset. This will hold the wire in place. DO NOT PUT THE HANDSET BACK INTO THE CHARGER, WITH THE BATTERY SHORTED OUT.
3. Wait about 30 minutes for the battery to completely die. Remove the jumper wire, and but the handset back into the charger.
4. If the battery was fully discharged , you will get a message on the handset telling you that you should let it will charge for 7 hours. If you do not get this message, then either the battery was not fully discharged, or your problem is different from mine. Try the procedure again in Step 3 for another 30 minutes to discharge the battery some more.
5. If you get the "Wait for 7 hours to charge" message on the handset, then leave it in the charging cradle for the 7 hours requested. After that, it should work fine.
Let me know how you make out.
Posted on Aug 11, 2008
My 1740 handset volume was also low. As a shot in the dark I changed the speaker and it fixed the problem. I got a new speaker from www.panasonic.com .
Posted on Aug 13, 2008
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