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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Motorola > Motorola Hardware Repair

Motorola Hardware Repair here all threads Related to Motorola Hardware Servicing and Repairing.

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Old 12-05-2001, 00:09   #1 (permalink)
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Red face Help!!! Problem with motorola V3688/3690

On my 2 motorolas v3690 and v3688, I broke the displays... so I decided to buy a new ones... I dissassembled correctly the phone... quit the flex cable and etc... (disconnected the ground on the screen... after that, I put the new displays... soldered the display GND and so... but with surprise, THERE'S NOTHING ON THE SCREEN!!! nothing, I checked the connectors, but nothing... and no beeps, no speaker, no led ignition and no display. But I know the phone works, because the main pcb works, if I use a hands free works... Can anyone help me??? It's strange to crash the 2 phones at the same time/way... so please help me.

Many thanks in advance and best regards,

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Old 12-05-2001, 08:33   #2 (permalink)
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You can try to clean and/or resolder the Flat-cable connector on the PCB , or if you can.. try another LCD , maybe you have 2 defective LCD?!?
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Old 12-05-2001, 23:21   #3 (permalink)
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did you bye..corect version of display...there is many versions of displays..and flats...look at the back of are going to see a diference <img src="smile.gif" border="0"> )))
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Old 05-08-2003, 15:52   #4 (permalink)
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take very care on dissasembly ..there are some resistors in front of plastic closers of the case, so if u use on opening some inadecvate tool u could remove them , so ur phone doesn't start anymore....check them with strong light and strong glasses. Try 2 resolder them again.
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Old 05-16-2003, 00:31   #5 (permalink)
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i can tell you interest info about cables
i had similar situation: i got V3688 with bad cable so i decided to change not full display but just cable
i bought cable, soldered correctly and tried to power on but on display was nothing and display ic was little hot
i compared 2 cables and found that position for 1 capacitor and 1 resistor(0 Ohm) are differend
so look carrefully on your new cable, compare with old and go to play new game "Find differences"
i sure you find them
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Old 08-31-2003, 19:53   #6 (permalink)
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1. Put display connector deeper
2. Check R4 and C10, if they changed - nothing on display
3. R1 - contrast (my 270k)
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Old 08-31-2003, 21:29   #7 (permalink)
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Better to by flat cabel + lcd, because exist feu wersion LCD and flex cabel... theyu is not compatible, so better do as I say...
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