greggo64, another nickname for the areca palm is the golden cane palm - a certain amount of golden coloration is to be expected particularly on the sheath and petiole of the (older)fronds. Yellowing along the edges of the fronds in such a pattern as to show up a green triangle when the frond is held upright and viewed as a whole, often indicates magnesium deficiency.
But these will not show up in 3 or 4 days. Nor is it likely to be a watering problem. Palms react comparatively slowly to internal issues. You are probably seeing the symptoms of a changed environment -temperature, light or humidity. Plants react to sudden changes by dropping their leaves. Ficus benjamina is my best example. The leaves first turn yellow and this stage is often missed. I suspect that the areca is doing that. Another feature of palms is that they have comparatively few leaves and the new leaves can take a long time to emerge and function. That is why we tend to leave them in place as long as possible. But you want this plant for display. If only the edges of the leaflets are unsightly then you can trim the frond with a pair of sharp scissors; follow the contour of the frond so that things look as nature intended. You will probably find that one or two fronds are too far gone or else if you attempt to trim them they will 'hurt your eyes'. Remove these entirely. Sometimes it is possible to remove only the apical part of the frond. You will be left with a 'decapitated' frond but if it is an inner frond it will be hidden and more importantly, it will be green and probably still functioning.
Watch carefully and regularly the youngest fronds, even the spindle. These will give you the earliest indication of how things are at root level.