I just repaired a Compaq 15" LCD screen Model FP15 Model Number PE1233 Product Name P9618C Manufactured in October 2003; it is similar to HP1502. This LCD has 2 boards, one 'power-backlight board' reference 715L1034-1 and one 'processor board'. This 715L1034-1 seems to be used by quite a few other lCD e.g. Ilyama, etc.
The 'power board' 715L1034-1 was not working. Main issue with the 'power board' were 7 HERMEI capacitors that had "bulged at the top and popped the rubber seal at the bottom", out of a total of 10 HERMEI capacitors on the board. Shame on you Compaq/HP for using in October 2003 known defective caps :-( .
I replaced these seven capacitors including 5 rated 470micF/16V [C926, C924, C929, C930, C930] and 2 rated 1000micF/16V [C922 & C925]. Due to these faulty caps, Zener diode ZD904 [7.5V, 150mW] had overheated but was still working; ZD904 can be tested in circuit by connecting +12V through a serie resistor to the Zener and measuring the voltage across the Zener; should be 0.7V one way and 7.5V the other. LCD is now working.
By the way, a decent 'Service Manual' of the power board can be found at http://www.eserviceinfo.com/index.ph...ing=vf15++fp15 but the component reference number have changed by 100 e.g. component C922 on the board will be C822 in the service manual. Hope this helps. Vince Berkeley
The 'power board' 715L1034-1 was not working. Main issue with the 'power board' were 7 HERMEI capacitors that had "bulged at the top and popped the rubber seal at the bottom", out of a total of 10 HERMEI capacitors on the board. Shame on you Compaq/HP for using in October 2003 known defective caps :-( .
I replaced these seven capacitors including 5 rated 470micF/16V [C926, C924, C929, C930, C930] and 2 rated 1000micF/16V [C922 & C925]. Due to these faulty caps, Zener diode ZD904 [7.5V, 150mW] had overheated but was still working; ZD904 can be tested in circuit by connecting +12V through a serie resistor to the Zener and measuring the voltage across the Zener; should be 0.7V one way and 7.5V the other. LCD is now working.
By the way, a decent 'Service Manual' of the power board can be found at http://www.eserviceinfo.com/index.ph...ing=vf15++fp15 but the component reference number have changed by 100 e.g. component C922 on the board will be C822 in the service manual. Hope this helps. Vince Berkeley
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