Sunday, February 27, 2011
What are the two bad things about Compaq Presario 2500 laptop
This is my review on the two bad things about Compaq Presario 2500 laptop. I owned this laptop and is now pronounced faulty because the CMOS battery no longer operating.
The first major problem i've experience with this laptop is the faulty keyboard. The keyboard constantly auto-type a character of the particular key which is spoiled. For example if your p alphabet key is spoiled then it will keep auto-type "p" non-stop constantly as long as the computer is turn on. From what i have read online there are bunch of people having similar problems complaining to HP about this.
The second major problem about this laptop is the CMOS battery holder. It is so fragile that if you are not careful to remove the CMOS battery, it will also remove battery holder from the motherboard. When it happens there is very small chance to fix it. This is because the motherboard connector to the CMOS battery holder has certain layer of electronic pathway that can only be done by factory soldering and cannot be re-attached using normal solder. This is what happen to my Compaq Presario 2500 now is faulty forever.
Never buy Compaq because it simply sucks. Even Acer brand is much better.
One simple circuit to step up voltage using LM2577 -Adj P+ chip. The schematic is from Texas Instrument and it works expected - and below is...