Having problems with your Acer Aspire T690 (AST690UP820A) PC Desktop ?

When you try to turn the tower on the fans start up but nothing happens it just has one long continous beep.


Answers :

Probably itz either minor case of improper ground..
or major case of faulty or defective main board/RAM/addon/daughter cards..

..plz do check the following as in order:..
the Hardware part:..
1)\015\012see if the ram(s) is loose/faulty..open clean/remove carbon &\015\012or oxide formed on the teeth with an eraser n resit it..or replace with\015\012a standby n see..

2) on main/mother\015\012board..see with a debug card for mb error..may b short..look for\015\012defective capacitors(espabove1000mfd)/mosfets..go through the mb's\015\012south bridge n the circuit lie around atx connector..the crystal clock\015\012generator (if cpu isn't heating up)..
\015\012
\015\0123) remove/clean dust\015\012neatly..dust is non-uniform in nature n may cause\015\012jam/short circuitry/excess resistance n many more..resulting an increase\015\012in heat..
\015\012
4) unplug mains supply..pick open/remove the cmos battery..check (above +3v)..resit..
\015\012
5) [in case of desktop] the\015\012smps itself may b defective/faulty..check the outputs of smps viz. 0v\015\012(black~ground); +12v(yellow); +5v (red, green~ps-on, violet~pg&\015\012grey~sb); -12v (blue);-5v(white); +3.3v(orange)..the 'oscillator and\015\012error amplifier ic',or pwm switching regulator circuit..look\015\012for defective protector-transformer/resistance (esp 4.7k)/mosfet..
check the battery n adapter [main power], in case of laptops..

6) see if ur hdd is noisy or emitting any 'ticking' noise (like 'tuk tuk' or 'kirr kirr')..or ur hdd is likely to b replaced..
\015\012
for\015\012any further assistance u may plz leave comment and or testimonials at\015\012any point of time, so that i/we can help or u think it to b helpful..

if u r not a professional, always better to seek advise from ur system admin/vendor....
Repair Help & Product Troubleshooting for Acer Aspire T690 (AST690UP820A) PC Desktop

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