audi a4 RB4 DASHBOARD REPAIR no displays

[gomarota]

Hi, im having dashboard like this

http://www.ebay.it/itm/Tacho-Kombiinstrument-Audi-A4-8E0920930T-Diesel-Bj-04-Cluster-Cockpit-E264-/361251037313

no displays. the three ones are not working

what can be the problem? maybe vogt 411 101?

regards

[d2mike]

Have you checked the eeprom dump? If the dash is displaying nothing, the eeprom could be full w/ FF.

[gomarota]

thanks for your reply, all the display works good, just no display in three displays

car starts and gauges are good

i attach dump, seems good

[d2mike]

What do you mean by just no displays? Please post a picture.

[Mr BLACK]

use a flashlight on display and see if tft is working ...if so backlight is not working ( vogt or hv tube )

[gomarota]

dissasembled whole dashboard, no leds on displays

I MEASURED VOLTAGE ON VOGT AND ALL 0 volts

tested all bcp_56_ and bsp_171 seems good

[gomarota]

i changed all bsp171 and bcp56 and still same problem.

i wonder why no voltage at any pins of VOGT, i cannot trace because pcb board is with more than 2 layers

[gomarota]

any help guys?

[gomarota]

read this

http://www.digital-kaos.co.uk/forums/showthread.php/366098-Audi-A4-2002-dashboard

same problem, but hee solved with new dash , i would like to repair