TV comes on but no video, just alternates through a cycle of displaying a full screen of red, green, blue, white and black screens.
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Re: Goodmans GTVL37W24HD LCD TV
Probably needs an eeprom reset as it is stuck in factory test mode. Who made this TV internally? (If you're not sure post some pictures of the boards; we may be able to guess.)Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: Goodmans GTVL37W24HD LCD TV
Hi, thanks for reply.
The internal boards are all Beko Elektronik.
Main b/d: HW1.190R-3
Service manual found here:
http://www.scribd.com/doc/28225165/Grundig-PE-ChassisLast edited by notallbad; 03-13-2013, 05:18 PM.Comment
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Re: Goodmans GTVL37W24HD LCD TV
Could low or absent voltages cause these symptoms?
Back panel removed.
Connector S1503 To PSU Pin 7 does not have any voltage present - looking at the schematics this should have 5v, please correct me if I am wrong.
No voltage present either in standby or when on.
Page 2-32.Last edited by notallbad; 03-14-2013, 03:33 AM.Comment
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Re: Goodmans GTVL37W24HD LCD TV
Sorry, please ignore the last post regarding Connector S1503.
There are no components for this circuit so I'm guessing this is not used for this TV set, i.e. no Q1500, J1500, J1501, R1504,5,7.Comment
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Re: Goodmans GTVL37W24HD LCD TV
I've tried to find how to reset it but nobody seems to know...Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Goodmans GTVL37W24HD LCD TV
Have repaired sets with this fault. From my experience Tom is correct. I only had this problem on vestel models. In my case just replaced eeproms I took off spare panels. Don't know procedure to reset your eeprom. Perhaps someone on this forum knows. Ron 77Comment
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Re: Goodmans GTVL37W24HD LCD TV
Perhaps installing a new blank eeprom would fix it.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Goodmans GTVL37W24HD LCD TV
OK thanks, so not looking good.
Another oddity is that the backlight flashes when first turning it on. Checking the 24v rails which drive the inverter it seems to take a while for the voltage to rise up to 22.6v. There is always 22.6v on the PSU outputs on power up when the cable is removed so its only when the connector is plugged into the LW6.194R-3 board S1501.
There are 2 inverter boards, master and slave.
With the slave still connected but master inverter disconnected the 24v rail rises to 22.6v no problems, obviously the backlights do not come on and there is no display.
With the master still connected but the slave disconnected the 24v rail rises to 22.6v sluggish but is much quicker than when both inverters are connected.Last edited by notallbad; 03-14-2013, 07:40 AM.Comment
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Re: Goodmans GTVL37W24HD LCD TV
The TV will sometimes start with just a blank (black) screen but with backlights on.
Of course with an input source plugged in there is sound.Comment
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Re: Goodmans GTVL37W24HD LCD TV
What are Analog_Dim and A/D_Dim_Sel ?Comment
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Re: Goodmans GTVL37W24HD LCD TV
Eeprom on page 2-17. System eeprom 8 pins. 24volt problem, check relevant caps on psu.Comment
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Re: Goodmans GTVL37W24HD LCD TV
LW6.194R-3
Uploaded with *************
ZZ7.194P-5
Uploaded with *************Comment
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Re: Goodmans GTVL37W24HD LCD TV
Buy a programmed eeprom for your model, that is one solution. Check availability. 24v problem, caps look ok, but could still be faulty. Clear your first mentioned problem, then proceed to the next.Comment
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Re: Goodmans GTVL37W24HD LCD TV
Side panel buttons do not appear to be working either but is this because the TV is in Service Mode?Comment
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Re: Goodmans GTVL37W24HD LCD TV
Because the tv is stuck in factory test mode, is why set is not functioning correctly. Try and get an eeprom.Comment
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Re: Goodmans GTVL37W24HD LCD TV
If you buy a progammed eeprom you only have to fit it. If there are adjusments to be made in service mode, they are not normally difficult.Comment
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Hi, wondering if anyone can help with a tv which seems to turn on but turn off soon after and continue to do this cycle over and over again.
It turns on, no sound and then turns off and starts the whole cycle again. I've opened up the back and can see the backlights turning on. However when I disconnect the two straps connecting the left hard board (as you look on the back of the TV), the boot cycle stops and it does turn on and I can hear the boot up sound, however no video?
Any thoughts, any help would be greatly appreciated....
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