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Month: December 2012

How to measure Laptop lcd screen size?

Screen sizes are normally measured in inches from one corner to the corner diagonally across from it. This diagonal measuring system actually came about because the early television manufacturers wanted to make the screen size of their TVs sound more impressive. Measuring your screen is quite easy: Learn more tips from laptop repairing institute; Step […]

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Laptopchip level problems & solutions Part no 3

#1 1. Is there a “generic” current profile for laptops or does each laptop have it’s own unique current profile? 2. In your example for DV9000, you say “0.01 – 0.3 -0.9 – 1.1 – 0.9 – 1.2 -1.45 then display” Can you explain what happens at each current change state? 3. Do you need […]

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Laptop chiplevel problems & solutions Part 2

#1. mbx-165 with circuit protection problem Sol: when the PQ20 -PUMB2 is not solder in the mobo i get the correct voltage 9v at gate in PQ26 DC_IN_G1 Same as the motherboard, the pq26’s G (DC_IN_G1) has 18V so DC_IN_R not present. DC_MOS_IN is 18V, pq25’s G is 9V. So charging chip max1909 should be […]

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Laptop chiplevel problems & solutions Part 1

#1.Toshiba Satellite A205-SP4077, Core 2 Duo. While replacing cracked LCD tried several panels with no success. Then noticed LVDS RX2- signal from motherboard is missing. Solution: It is the north bridge dry joint, it is common fault of this model. Do BGA reworking on north bridge, and replace the north bridge if bga reworking doesn’t […]

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