Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

 
 
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Default HDMI problem on RP JVC


"Curtis Brown" wrote in message
...

"Steve" nowhere.com wrote in message
...
On Mon, 28 Jul 2008 01:04:42 GMT, jordo wrote:

Steve wrote:
On Sun, 27 Jul 2008 23:29:55 GMT, jordo wrote:

Franc Zabkar wrote:
On Fri, 25 Jul 2008 00:00:03 GMT, jordo put
finger to keyboard and composed:

I have a JVC rear projection tv that I bought second hand a little
over a
year ago. It works fine except for the HDMI input. When I plug it
into my
cable box and switch to the digital input, it can't detect anything
(and
says it's gonna turn off in 9 minutes if nothing is connected before
then
). However, if I plug in my computer via a dvi/hdmi cable, the tv
still
doesn't detect a connection, but the computer recognizes the tv for
the
model number that it is.
To recognise the TV, the computer only needs to be able to read the
TV's EDID EEPROM via the DDC pins in the cable (pins 6,7,14,15):

http://pinouts.ru/VideoCables/hdmi_d...e_pinout.shtml

I have managed to read a powered-down monitor's EDID EEPROM using my
device programmer. I made a VGA DB15-to-DIP8 adapter cable and told
the programmer that it was connected to an Atmel AT24C21 serial
EEPROM
which has a "DDC1/ DDC2 Interface Compliant for Monitor
Identification".

You can find the EDID in the registry at the following key:

HKEY_LOCAL_MACHINE\Enum\MONITOR

If you export that key to a .reg file, you will see the EDID EEPROM
data. Analysing the EDID will tell you what scan rates the TV
supports. FWIW, if you post your EDID here, I may be able to analyse
the data for you.

BTW, if you want someone to help you, it would help them if you would
indicate the TV's model number.

- Franc Zabkar
Hi again Franc,

I don't have a registry key called Enum under HKLM...I'm using Vista,
btw...that probably would've helped, eh?

I hope you are aware that JVC booby-traped the DVI modue in this set to
avoid
tampering. If you remove the back without taking precautions say bye
to your digital
input. See: http://www.iwaynet.net/~nesda/Jan04/Jan0413.html

Steve
Yeah, I've read that. I haven't taken the back off, but I bought it
second-hand, so it could have been serviced in the past. However, there
is a way to reset the HDMI module from within the service menu (you do a
self-check, then turn off the tv from within the menu and unplug for 30
seconds, according to a few forums I've read). However, I don't know
how to get into this service menu.


Thats not what I was told by JVC, but if you think it will fix it give it
a try;

SERVICE MENU setting
a) Press [SLEEP TIMER] key and, while the indication of
SLEEP TIMER 0 MIN is being displayed, press
[DISPLAY] key and [VIDEO STATUS] key on the
remote control unit (Fig.2) simultaneously.
b) The SERVICE MENU screen of Fig.1 is displayed.
c) Verify what to set in the SERVICE MENU, and set
whatever is necessary

Be very careful NOT to change any settings if you don't want to create a
boat ancor.


A great idea just popped in my brain:

How's about you tell him what settings NOT to change if he doesn't want to
create a boat anchor.

Steve
Steve Tomaszewski N2PTJ
6 North Hill Dr
Ballston Lake, NY 12019
518-877-5528



A great idea just popped in my brain 2:

y don't u stop being such a big fat meanie that nobody likes so somebody can
like u u big fat meanie



 
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