Question about Hitachi VT-RM391A Remote Control
My remote has worked fine with my Hitachi CT7970B/K TV, but suddenly last week the buttons on the control stopped working except for volume. This means I have to turn the TV on and off manually and manually press the control under the screen to go up a channel. For example, to go from NBC to Turner Classic Movies means pressing that control 82 times to get from 4 to 86!
I've called Hitachi and they don't know what's happened. I even got another remote, but it was the same pattern -- only the volume remote toggle elicits a response.
We suspect we pressed a "wrong" button or did something wrong that incapacitated the remote keypad and channel up-down toggle. Can you help?
Your concern to my understanding is the TV unit will not respond to the original remote nor to a replacement remote except for volume up/down. Two possible causes:
1. defective IR (infrared) preamplifier circuitry internal to the unit;
2. corrupt EEPROM (possibly due to trial/use of a universal remote or was just zapped).
This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards.
Thank you for using FixYa.
Posted on Jul 17, 2008
If there is a tv button on the remote, try pressing that..
Chances are its damaged and you might need to order a new one from Hitachi or possibly use a universal.. With remotes there really isnt much you can do when they stop functioning.
Posted on Jul 17, 2008
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