Many thanks to the front desk personnel. They are very nice. I almost feel bad for the guy who was trying really hard to fix the electricity.
My first stay at the Beyazithan was terrible because the room has no electricity. Plus, the bathroom is not sealed! Taking a shower in a not heated room in winter Istanbul is just fun. Even though the room has a radiator but it is not strong enough the toast the whole room. I ended up having a pinch nerve on my neck.
Also, if you are a none smoker, give it a second thought before you click the button. Since the apt isn’t sealed well, you will smell it from downstairs (mostly likely from the front desk cuz they probably are the only smokers in the building).
Luckily they fixed the wiring for my room(number 12) for the second day. But I left without even staying over night.
If I may suggest somewhere to stay in Istanbul, avoid old town. Try to find somewhere in taksim square where is cleaner.