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Display LCD 2004 defect ?


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Am un display LCD, 20 de caractere pe 4 randuri care, din momentul in care l-am cumparat si probat
a afisat cam cuidat, in sensul ca pe randurile 3 si 4, carcterele de la 9 la 16 sint foarte neclare si instabile (fileaza).
Initial am crezut ca poate este vorba de un contact mai slab intre PCB si benzile elastomerice, asa ca am desfacut display-ul
am curatat PCB-ul si l-am reasamblat, insa problema persista (asa cum cred ca se poate vedea, cat de cat, in fisierul atatasat).
Se poate face ceva sau display-ul este prost si e de dat la gunoi ?

lcd.jpg

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am reusit si am facut testul. 

am scris un cod scurt care care afiseaza *test*test pe fiecare dintre cele 4 linii cu refresh de o secunda.

nicio schimbare !

randurile 3 si 4 intre caracterele 9-16 "fileaza" si nu sint lizibile dupa cum se vede in foto atasat.

mai e ceva de facut ?

lcd.jpg

Edited by messu
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