White's XLT Replacement Screen Issues

[nickel_n]

Here is some info I collect about the mode
Unfortunately i don't remember where from
Sorry but i can't give credit to the author

[ric44]

Well my new display came in and got it installed Screen came on and displayed the correct characters but still have problems..........no backlight . I checked the backlight plug-in on the board and have the correct 5v on the pins . I have the pigtail soldered correctly to the display board 5v and the polarity is correct . I should be getting 5v to the display but I am not . I checked and only measured a bit over 2v . I assume not enough to illuminate the screen . Why would I have the correct 5v on the pigtail and then then when attached to the display board it drops to 2v ? I can hook a independent 5v power supply to the screen and bam it lights up great . What can be causing the drop in voltage with everything connected ? Seems I'm at a loss again ...........

[pito]

Old PCB = there can be invisible corrosion on soldering points of the connector, resolder them.
How LCD was dying, slowly each day getting worse or rapidly = on one day ok on next day dead ?

[ric44]

Show the picture how LCD is connected to main board.

[pito]

Show the picture how LCD is connected to main board.

[ric44]

could be that you had a bad connection somewhere
why don't you get a contact cleaner spray and clean all contacts on both boards.
make sure that you get a spay with NO oil

I will do that just to be sure .

[nickel_n]

could be that you had a bad connection somewhere
why don't you get a contact cleaner spray and clean all contacts on both boards.
make sure that you get a spay with NO oil

[ric44]

Well back to the XLT display problems . This morning I put the suspect replacement display module on a breadboard and connected grounds and power to the appropriate pinouts . To my surprise the screen came on complete with a blue border and a working backlight . This has me thinking my problem may lie with the driver board the display plugs in to . I'd be completely lost trying to figure out component failure on the driver board and am going to try and search out the complete board . I have already converted this board with the resistor mods for the new display . Will the be a compatible driver board available for this application ? I've included a pic of the original one . PS The thing is I did have a working display besides the missing segments before doing the mods .I'm bumfuzzeled .

[ric44]

the same size and pins


https://www.google.com/search?q=wg12...koIEAIYAiACKAI

Installation: It is generally a direct drop-in replacement for the original display module, though proper soldering and, in some cases, adjustment of the contrast potentiometer may be required

https://www.aliexpress.com/item/1005...003436704_1

It's still thicker than the original and it still requires modifications and soldering skills to both it and the driver board . It's no drop in .

[pito]

There is no direct replacement . .

the same size and pins


https://www.google.com/search?q=wg12...koIEAIYAiACKAI

Installation: It is generally a direct drop-in replacement for the original display module, though proper soldering and, in some cases, adjustment of the contrast potentiometer may be required

https://www.aliexpress.com/item/1005...003436704_1

[ric44]

i was looking for the original part number and the part number of the replacement that was sold as direct replacement.
an 128x64 LCD if i remember well it physically larger than the original

There is no direct replacement . They were gone long ago . They operated on AC current instead of DC via a converter . The replacement lcd's are 5v DC and are a thicker unit making it necessary to trim the case mounting bosses back to accomodate the extra width . Google replacing the XLT display . It opens up a whole new can of worms . The driver board it sits on has to be modified . It is an involved process and I have found nothing online that shows a step by step process . There are those that make money selling and replacing the displays and are seemingly reluctant to outline the process for the DIY'er . Maybe someone here has pics and can detail the process . If so post up . It would help a lot of people .

[kt315]

... .....

[nickel_n]

https://www.facebook.com/groups/3346...2079169504935/

google for 128×64 LCD

https://www.aliexpress.com/p/tesla-l...rm=true&isdl=y

i was looking for the original part number and the part number of the replacement that was sold as direct replacement.
an 128x64 LCD if i remember well it physically larger than the original

[ric44]

Played around a little this morning with the display and a multimeter and I'm thinking I may have found the problem with it . Several of the smd capacitors showed no values and I found one that was open ( marked CF on the board ). Anyhow I got a couple of new LCD's on the way .

[pito]

https://www.facebook.com/groups/3346...2079169504935/

google for 128×64 LCD

https://www.aliexpress.com/p/tesla-landing/index.html?scenario=c_ppc_item_bridge&productId=1005004937402336&_immersiveMode=true&withMainCard=true&src=google&aff_platform=true&isdl=yhttps://www.aliexpress.com/p/tesla-landing/index.html?scenario=c_ppc_item_bridge&productId=1005004937402336&_immersiveMode=true&withMainCard=true&src=google&aff_platform=true&isdl=y