MD1 VA2 refuses to boot

[villahed94]

Long story short: I was modding my VA2 Genesis with a CXA2075 .
Thing worked until one day the encoder started to display wrong colours. I decided to check what was going on.
I discovered that a capacitor on the CXA2075 side had desoldered. After resoldering, I hooked the system up and to my horror and surprise, the thing was not booting anymore.
I tried booting Genesis, SMS, SCD and 32x games , all of them failing to boot.
When I turn the system up, I notice some sort of slight "shoosh" at regular intervals(10 seconds approximately).
What could be causing this issue? I really need help here, it was my only working Genesis until yesterday. Any help will really be appreciated.

[Solkia]

EDIT: Nevermind, reread the OP

[Guntz]

As I said before in MSN Messenger, check over the entire system for bridged traces, like from bits of metal or solder. Make sure nothing is bridging the pins on QFPs, DIP ICs, caps or any other part of the PCB.

[MEGADRIVE Jeroi]

Wash entire mobo with soap water and let it dry couple hours in the sunshine. Then check your modifications, you may have accidentally cut one trace or soldered a bridge in couple pins. Remove the cap and replace it with same value. Spray cold aircan to all caps and boot the console, see if console starts then suddenly when warming again stops, you have a faulty cap. Spraying cold air is good for single cap testing on mobo, start from near the powersupply ones, spray cold try boot, then again and try boot and this wway you may find your defect cap.

[villahed94]

I have to add that the YM2612 gets too hot. Will it be because of a broken cap?
I have already replaced all of them, except for one

[madmax2069]

I have to add that the YM2612 gets too hot. Will it be because of a broken cap?
I have already replaced all of them, except for one

Almost sounds like somethings shorting out, or supplying improper current, or somehow the chips fragged. You might as well replace the other cap as well unless it tested good.